drm/exynos: add fimc ipp driver

FIMC is stand for Fully Interfactive Mobile Camera and
supports image scaler/rotator/crop/flip/csc and input/output DMA operations
and also supports writeback and display output operations.

This driver is registered to IPP subsystem framework to be used by user side
and user can control the FIMC hardware through some interfaces of IPP subsystem
framework.

Changelog v6:
- fix build warning.

Changelog v1 ~ v5:
- add comments, code fixups and cleanups.

Signed-off-by: Eunchul Kim <chulspro.kim@samsung.com>
Signed-off-by: Jinyoung Jeon <jy0.jeon@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
diff --git a/drivers/gpu/drm/exynos/Kconfig b/drivers/gpu/drm/exynos/Kconfig
index 80ab242..66c02df 100644
--- a/drivers/gpu/drm/exynos/Kconfig
+++ b/drivers/gpu/drm/exynos/Kconfig
@@ -51,3 +51,9 @@
 	depends on DRM_EXYNOS
 	help
 	  Choose this option if you want to use IPP feature for DRM.
+
+config DRM_EXYNOS_FIMC
+	bool "Exynos DRM FIMC"
+	depends on DRM_EXYNOS_IPP
+	help
+	  Choose this option if you want to use Exynos FIMC for DRM.