drm/arm: Delete redundant CONFIG_DRM_ARM

Delete redundant CONFIG_DRM_ARM, and add a menu "ARM devices" to subclass
ARM device drivers.
Signed-off-by: James (Qian) Wang <james.qian.wang@arm.com>
Signed-off-by: Liviu Dudau <liviu.dudau@arm.com>

drivers/gpu/drm/Makefile

@@ -51,7 +51,7 @@ obj-$(CONFIG_DRM_DEBUG_SELFTEST) += selftests/
 obj-$(CONFIG_DRM)	+= drm.o
 obj-$(CONFIG_DRM_MIPI_DSI) += drm_mipi_dsi.o
 obj-$(CONFIG_DRM_PANEL_ORIENTATION_QUIRKS) += drm_panel_orientation_quirks.o
-obj-$(CONFIG_DRM_ARM)	+= arm/
+obj-y			+= arm/
 obj-$(CONFIG_DRM_TTM)	+= ttm/
 obj-$(CONFIG_DRM_SCHED)	+= scheduler/
 obj-$(CONFIG_DRM_TDFX)	+= tdfx/

drivers/gpu/drm/arm/Kconfig

-config DRM_ARM
-	bool
-	help
-	  Choose this option to select drivers for ARM's devices
+# SPDX-License-Identifier: GPL-2.0
+menu "ARM devices"
 
 config DRM_HDLCD
 	tristate "ARM HDLCD"
 	depends on DRM && OF && (ARM || ARM64)
 	depends on COMMON_CLK
-	select DRM_ARM
 	select DRM_KMS_HELPER
 	select DRM_KMS_CMA_HELPER
 	help
@@ -29,7 +26,6 @@ config DRM_MALI_DISPLAY
 	tristate "ARM Mali Display Processor"
 	depends on DRM && OF && (ARM || ARM64)
 	depends on COMMON_CLK
-	select DRM_ARM
 	select DRM_KMS_HELPER
 	select DRM_KMS_CMA_HELPER
 	select DRM_GEM_CMA_HELPER
@@ -40,3 +36,5 @@ config DRM_MALI_DISPLAY
 	  of the hardware.
 
 	  If compiled as a module it will be called mali-dp.
+
+endmenu