[media] s5p-csis: Add missing dependency on PLAT_S5P

s5p-csis is to be built only on S5P SoC platforms.

Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/drivers/media/video/Kconfig b/drivers/media/video/Kconfig
index cf5a1f6..bb53de7 100644
--- a/drivers/media/video/Kconfig
+++ b/drivers/media/video/Kconfig
@@ -954,7 +954,7 @@
 
 config VIDEO_S5P_MIPI_CSIS
 	tristate "Samsung S5P and EXYNOS4 MIPI CSI receiver driver"
-	depends on VIDEO_V4L2 && PM_RUNTIME && VIDEO_V4L2_SUBDEV_API
+	depends on VIDEO_V4L2 && PM_RUNTIME && PLAT_S5P && VIDEO_V4L2_SUBDEV_API
 	---help---
 	  This is a v4l2 driver for Samsung S5P/EXYNOS4 MIPI-CSI receiver.