s3c-camif: Use CONFIG_ARCH_S3C64XX to check for S3C64XX support

Since CONFIG_PLAT_S3C64XX is going to be removed, this patch modifies
the Kconfig entry of s3c-camif driver to use the proper way of checking
for S3C64xx support - CONFIG_ARCH_S3C64XX.
Signed-off-by: Tomasz Figa <tomasz.figa@gmail.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>

drivers/media/platform/Kconfig

@@ -112,7 +112,7 @@ config VIDEO_OMAP3_DEBUG
 config VIDEO_S3C_CAMIF
 	tristate "Samsung S3C24XX/S3C64XX SoC Camera Interface driver"
 	depends on VIDEO_V4L2 && I2C && VIDEO_V4L2_SUBDEV_API
-	depends on (PLAT_S3C64XX || PLAT_S3C24XX) && PM_RUNTIME
+	depends on (ARCH_S3C64XX || PLAT_S3C24XX) && PM_RUNTIME
 	select VIDEOBUF2_DMA_CONTIG
 	---help---
 	  This is a v4l2 driver for s3c24xx and s3c64xx SoC series camera