drm/tilcdc: Remove obsolete "ti,tilcdc,slave" dts binding support

This patch removes DRM_TILCDC_SLAVE_COMPAT option for supporting the
obsolete "ti,tilcdc,slave" device tree binding. The new of_graph based
binding - that is widely used in other drm driver too - has been
supported since Linux v4.2. Maintaining the the backwards dts
conversion code in the DRM_TILCDC_SLAVE_COMPAT has become a nuisance
for the device/of development so the we decided to drop it after Linux
v4.14, the 2017 LTS.

Signed-off-by: Jyri Sarha <[email protected]>
Acked-by: Rob Herring <[email protected]>

Author: Jyri Sarha

drivers/gpu/drm/tilcdc/Kconfig

@@ -12,14 +12,3 @@ config DRM_TILCDC
 	  controller, for example AM33xx in beagle-bone, DA8xx, or
 	  OMAP-L1xx.  This driver replaces the FB_DA8XX fbdev driver.
 
-config DRM_TILCDC_SLAVE_COMPAT
-	bool "Support device tree blobs using TI LCDC Slave binding"
-	depends on DRM_TILCDC
-	default y
-	select OF_RESOLVE
-	select OF_OVERLAY
-	help
-	  Choose this option if you need a kernel that is compatible
-	  with device tree blobs using the obsolete "ti,tilcdc,slave"
-	  binding. If you find "ti,tilcdc,slave"-string from your DTB,
-	  you probably need this. Otherwise you do not.

drivers/gpu/drm/tilcdc/Makefile

@@ -2,9 +2,6 @@ ifeq (, $(findstring -W,$(EXTRA_CFLAGS)))
 	ccflags-y += -Werror
 endif
 
-obj-$(CONFIG_DRM_TILCDC_SLAVE_COMPAT) += tilcdc_slave_compat.o \
-					 tilcdc_slave_compat.dtb.o
-
 tilcdc-y := \
 	tilcdc_plane.o \
 	tilcdc_crtc.o \