ARM: ux500: remove deleted file from Makefile

Cleanup removed the file, but Makefile was overlooked. Purge there too.

Fixes: 4b483ed0be8b ('ARM: ux500: cut some platform data')
Signed-off-by: Olof Johansson <olof@lixom.net>

arch/arm/mach-ux500/Makefile

@@ -4,7 +4,6 @@
 
 obj-y				:= pm.o
 obj-$(CONFIG_UX500_SOC_DB8500)	+= cpu-db8500.o
-obj-$(CONFIG_MACH_MOP500)	+= board-mop500-audio.o
 obj-$(CONFIG_SMP)		+= platsmp.o
 obj-$(CONFIG_HOTPLUG_CPU)	+= hotplug.o
 obj-$(CONFIG_PM_GENERIC_DOMAINS) += pm_domains.o