Makefile: Add missing soc_camera/ directory

drivers/built-in.o: In function `imx074_s_power':
imx074.c:(.text+0x1de93d0): undefined reference to `soc_camera_power_on'
imx074.c:(.text+0x1de93f3): undefined reference to `soc_camera_power_off'
drivers/built-in.o: In function `mt9m001_s_mbus_config':

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/platform/Makefile

@@ -40,6 +40,8 @@ obj-$(CONFIG_ARCH_DAVINCI)		+= davinci/
 
 obj-$(CONFIG_VIDEO_SH_VOU)		+= sh_vou.o
 
+obj-$(CONFIG_SOC_CAMERA)		+= soc_camera/
+
 obj-y	+= davinci/
 
 obj-$(CONFIG_ARCH_OMAP)	+= omap/