media: platform: rga: move config to its own file

In order to better organize the platform/Kconfig, place
rga-specific config stuff on a separate Kconfig file.
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>

drivers/media/platform/Kconfig

@@ -58,6 +58,7 @@ source "drivers/media/platform/qcom/camss/Kconfig"
 source "drivers/media/platform/qcom/venus/Kconfig"
 
 source "drivers/media/platform/aspeed/Kconfig"
+source "drivers/media/platform/rockchip/rga/Kconfig"
 
 config VIDEO_MUX
 	tristate "Video Multiplexer"
@@ -284,21 +285,6 @@ config VIDEO_STM32_DMA2D
 	  The STM32 DMA2D is a memory-to-memory engine for pixel conversion
 	  and specialized DMA dedicated to image manipulation.
 
-config VIDEO_ROCKCHIP_RGA
-	tristate "Rockchip Raster 2d Graphic Acceleration Unit"
-	depends on V4L_MEM2MEM_DRIVERS
-	depends on VIDEO_DEV && VIDEO_V4L2
-	depends on ARCH_ROCKCHIP || COMPILE_TEST
-	select VIDEOBUF2_DMA_SG
-	select V4L2_MEM2MEM_DEV
-	help
-	  This is a v4l2 driver for Rockchip SOC RGA 2d graphics accelerator.
-	  Rockchip RGA is a separate 2D raster graphic acceleration unit.
-	  It accelerates 2D graphics operations, such as point/line drawing,
-	  image scaling, rotation, BitBLT, alpha blending and image blur/sharpness.
-
-	  To compile this driver as a module choose m here.
-
 config VIDEO_TI_VPE
 	tristate "TI VPE (Video Processing Engine) driver"
 	depends on V4L_MEM2MEM_DRIVERS

drivers/media/platform/rockchip/rga/Kconfig

+config VIDEO_ROCKCHIP_RGA
+	tristate "Rockchip Raster 2d Graphic Acceleration Unit"
+	depends on V4L_MEM2MEM_DRIVERS
+	depends on VIDEO_DEV && VIDEO_V4L2
+	depends on ARCH_ROCKCHIP || COMPILE_TEST
+	select VIDEOBUF2_DMA_SG
+	select V4L2_MEM2MEM_DEV
+	help
+	  This is a v4l2 driver for Rockchip SOC RGA 2d graphics accelerator.
+	  Rockchip RGA is a separate 2D raster graphic acceleration unit.
+	  It accelerates 2D graphics operations, such as point/line drawing,
+	  image scaling, rotation, BitBLT, alpha blending and image blur/sharpness.
+
+	  To compile this driver as a module choose m here.