kbuild: remove unnecessary variable initializaions

Clearing obj-y, obj-m, obj-n, obj- in each Makefile is
a useless habit.

They are non-exported variables; therefore they are always empty
whenever descending into each subdirectory.
(Moreorver, obj-y and obj-m are also set to empty at the beginning
of scripts/Makefile.build)

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Acked-by: Peter Foley <pefoley2@pefoley.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Michal Marek <mmarek@suse.cz>

arch/arm/mach-at91/Makefile

@@ -3,9 +3,6 @@
 #
 
 obj-y		:= irq.o gpio.o setup.o sysirq_mask.o
-obj-m		:=
-obj-n		:=
-obj-		:=
 
 obj-$(CONFIG_OLD_CLK_AT91)	+= clock.o
 obj-$(CONFIG_AT91_SAM9_ALT_RESET) += at91sam9_alt_reset.o

arch/arm/mach-ebsa110/Makefile

@@ -5,6 +5,3 @@
 # Object file lists.
 
 obj-y			:= core.o io.o leds.o
-obj-m			:=
-obj-n			:=
-obj-			:=

arch/arm/mach-ep93xx/Makefile

@@ -2,9 +2,6 @@
 # Makefile for the linux kernel.
 #
 obj-y			:= core.o clock.o
-obj-m			:=
-obj-n			:=
-obj-			:=
 
 obj-$(CONFIG_EP93XX_DMA)	+= dma.o
 

arch/arm/mach-exynos/Makefile

@@ -7,11 +7,6 @@
 
 ccflags-$(CONFIG_ARCH_MULTIPLATFORM) += -I$(srctree)/$(src)/include -I$(srctree)/arch/arm/plat-samsung/include
 
-obj-y				:=
-obj-m				:=
-obj-n				:=
-obj-				:=
-
 # Core
 
 obj-$(CONFIG_ARCH_EXYNOS)	+= exynos.o pmu.o exynos-smc.o firmware.o

arch/arm/mach-footbridge/Makefile

@@ -5,9 +5,6 @@
 # Object file lists.
 
 obj-y			:= common.o dma.o isa-irq.o
-obj-m			:=
-obj-n			:=
-obj-			:=
 
 pci-y			+= dc21285.o
 pci-$(CONFIG_ARCH_CATS) += cats-pci.o

arch/arm/mach-iop13xx/Makefile

@@ -1,8 +1,3 @@
-obj-y			:=
-obj-m			:=
-obj-n			:=
-obj-			:=
-
 obj-$(CONFIG_ARCH_IOP13XX) += setup.o
 obj-$(CONFIG_ARCH_IOP13XX) += irq.o
 obj-$(CONFIG_ARCH_IOP13XX) += pci.o

arch/arm/mach-iop32x/Makefile

@@ -3,9 +3,6 @@
 #
 
 obj-y			:= irq.o
-obj-m			:=
-obj-n			:=
-obj-			:=
 
 obj-$(CONFIG_MACH_GLANTANK) += glantank.o
 obj-$(CONFIG_ARCH_IQ80321) += iq80321.o

arch/arm/mach-iop33x/Makefile

@@ -3,9 +3,6 @@
 #
 
 obj-y			:= irq.o uart.o
-obj-m			:=
-obj-n			:=
-obj-			:=
 
 obj-$(CONFIG_ARCH_IQ80331) += iq80331.o
 obj-$(CONFIG_MACH_IQ80332) += iq80332.o

arch/arm/mach-ks8695/Makefile

@@ -4,9 +4,6 @@
 #
 
 obj-y				:= cpu.o irq.o time.o devices.o
-obj-m				:=
-obj-n				:=
-obj-				:=
 
 # PCI support is optional
 obj-$(CONFIG_PCI)		+= pci.o

arch/arm/mach-rpc/Makefile

@@ -5,7 +5,3 @@
 # Object file lists.
 
 obj-y			:= dma.o ecard.o fiq.o irq.o riscpc.o time.o
-obj-m			:=
-obj-n			:=
-obj-			:=
-

arch/arm/mach-s3c24xx/Makefile

@@ -7,11 +7,6 @@
 #
 # Licensed under GPLv2
 
-obj-y				:=
-obj-m				:=
-obj-n				:=
-obj-				:=
-
 # core
 
 obj-y				+= common.o

arch/arm/mach-s3c64xx/Makefile

@@ -5,11 +5,6 @@
 #
 # Licensed under GPLv2
 
-obj-y				:=
-obj-m				:=
-obj-n				:=
-obj-				:=
-
 # Core
 
 obj-y				+= common.o

arch/arm/mach-s5pv210/Makefile

@@ -7,11 +7,6 @@
 
 ccflags-$(CONFIG_ARCH_MULTIPLATFORM) += -I$(srctree)/$(src)/include -I$(srctree)/arch/arm/plat-samsung/include
 
-obj-y				:=
-obj-m				:=
-obj-n				:=
-obj-				:=
-
 # Core
 
 obj-$(CONFIG_PM_SLEEP)		+= pm.o sleep.o

arch/arm/mach-sa1100/Makefile

@@ -4,9 +4,6 @@
 
 # Common support
 obj-y := clock.o generic.o irq.o time.o #nmi-oopser.o
-obj-m :=
-obj-n :=
-obj-  :=
 
 # Specific board support
 obj-$(CONFIG_SA1100_ASSABET)		+= assabet.o

arch/arm/mach-u300/Makefile

@@ -3,9 +3,6 @@
 #
 
 obj-y		:= core.o
-obj-m		:=
-obj-n		:=
-obj-		:=
 
 obj-$(CONFIG_MACH_U300_SPIDUMMY)  += dummyspichip.o
 obj-$(CONFIG_REGULATOR_AB3100)    += regulator.o

arch/arm/plat-iop/Makefile

@@ -2,8 +2,6 @@
 # Makefile for the linux kernel.
 #
 
-obj-y :=
-
 # IOP32X
 obj-$(CONFIG_ARCH_IOP32X) += i2c.o
 obj-$(CONFIG_ARCH_IOP32X) += pci.o
@@ -27,7 +25,3 @@ obj-$(CONFIG_ARCH_IOP33X) += restart.o
 # IOP13XX
 obj-$(CONFIG_ARCH_IOP13XX) += cp6.o
 obj-$(CONFIG_ARCH_IOP13XX) += time.o
-
-obj-m                  :=
-obj-n                  :=
-obj-                   :=

arch/arm/plat-omap/Makefile

@@ -6,9 +6,6 @@ ccflags-$(CONFIG_ARCH_MULTIPLATFORM) := -I$(srctree)/arch/arm/plat-omap/include
 
 # Common support
 obj-y := sram.o dma.o counter_32k.o
-obj-m :=
-obj-n :=
-obj-  :=
 
 # omap_device support (OMAP2+ only at the moment)
 

arch/arm/plat-samsung/Makefile

@@ -6,10 +6,6 @@
 
 ccflags-$(CONFIG_ARCH_MULTI_V7) += -I$(srctree)/$(src)/include
 
-obj-y				:=
-obj-m				:=
-obj-				:=
-
 # Objects we always build independent of SoC choice
 
 obj-y				+= init.o cpu.o