drm/exynos: remove DRM_EXYNOS_DMABUF config

The exynos drm driver has DRIVER_PRIME capability, then it's reasonable
to support dmabuf as default. Remove DRM_EXYNOS_DMABUF config, it will
prevent that user selects the option unnecessarily.
Signed-off-by: Joonyoung Shim <jy0922.shim@samsung.com>
Reviewed-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
Signed-off-by: Inki Dae <inki.dae@samsung.com>

drivers/gpu/drm/exynos/Kconfig

@@ -16,12 +16,6 @@ config DRM_EXYNOS_IOMMU
 	depends on DRM_EXYNOS && EXYNOS_IOMMU && ARM_DMA_USE_IOMMU
 	default y
 
-config DRM_EXYNOS_DMABUF
-	bool "EXYNOS DRM DMABUF"
-	depends on DRM_EXYNOS
-	help
-	  Choose this option if you want to use DMABUF feature for DRM.
-
 config DRM_EXYNOS_FIMD
 	bool "Exynos DRM FIMD"
 	depends on DRM_EXYNOS && !FB_S3C

drivers/gpu/drm/exynos/Makefile

@@ -6,10 +6,9 @@ ccflags-y := -Iinclude/drm -Idrivers/gpu/drm/exynos
 exynosdrm-y := exynos_drm_drv.o exynos_drm_encoder.o \
 		exynos_drm_crtc.o exynos_drm_fbdev.o exynos_drm_fb.o \
 		exynos_drm_buf.o exynos_drm_gem.o exynos_drm_core.o \
-		exynos_drm_plane.o
+		exynos_drm_plane.o exynos_drm_dmabuf.o
 
 exynosdrm-$(CONFIG_DRM_EXYNOS_IOMMU) += exynos_drm_iommu.o
-exynosdrm-$(CONFIG_DRM_EXYNOS_DMABUF) += exynos_drm_dmabuf.o
 exynosdrm-$(CONFIG_DRM_EXYNOS_FIMD)	+= exynos_drm_fimd.o
 exynosdrm-$(CONFIG_DRM_EXYNOS_DPI)	+= exynos_drm_dpi.o
 exynosdrm-$(CONFIG_DRM_EXYNOS_DSI)	+= exynos_drm_dsi.o

drivers/gpu/drm/exynos/exynos_drm_dmabuf.h

@@ -12,14 +12,9 @@
 #ifndef _EXYNOS_DRM_DMABUF_H_
 #define _EXYNOS_DRM_DMABUF_H_
 
-#ifdef CONFIG_DRM_EXYNOS_DMABUF
 struct dma_buf *exynos_dmabuf_prime_export(struct drm_device *drm_dev,
 				struct drm_gem_object *obj, int flags);
 
 struct drm_gem_object *exynos_dmabuf_prime_import(struct drm_device *drm_dev,
 						struct dma_buf *dma_buf);
-#else
-#define exynos_dmabuf_prime_export		NULL
-#define exynos_dmabuf_prime_import		NULL
-#endif
 #endif