drm/amd/display: Drop CONFIG_DRM_AMD_DC_DCN2_1 flag

[Why]

DCN21 is stable enough to be build by default. So drop the flags.

[How]

Remove them using the unifdef tool. The following commands were executed
in sequence:

$ find -name '*.c' -exec unifdef -m -DCONFIG_DRM_AMD_DC_DCN2_1 -UCONFIG_TRIM_DRM_AMD_DC_DCN2_1 '{}' ';'
$ find -name '*.h' -exec unifdef -m -DCONFIG_DRM_AMD_DC_DCN2_1 -UCONFIG_TRIM_DRM_AMD_DC_DCN2_1 '{}' ';'

In addition:

* Remove from kconfig, and replace any dependencies with DCN1_0.
* Remove from any makefiles.
* Fix and cleanup Renoir definitions in dal_asic_id.h
* Expand DCN1 ifdef to include DCN21 code in the following files:
    * clk_mgr/clk_mgr.c: dc_clk_mgr_create()
    * core/dc_resources.c: dc_create_resource_pool()
    * gpio/hw_factory.c: dal_hw_factory_init()
    * gpio/hw_translate.c: dal_hw_translate_init()

Signed-off-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/Kconfig

@@ -15,23 +15,7 @@ config DRM_AMD_DC
 config DRM_AMD_DC_DCN1_0
 	def_bool n
 	help
-	  RV and NV family support for display engine
-
-config DRM_AMD_DC_DCN2_1
-	bool "DCN 2.1 family"
-	depends on DRM_AMD_DC && X86
-	help
-	  Choose this option if you want to have
-	  Renoir support for display engine
-
-config DRM_AMD_DC_DSC_SUPPORT
-	bool "DSC support"
-	default y
-	depends on DRM_AMD_DC && X86
-	depends on DRM_AMD_DC_DCN1_0
-	help
-	  Choose this option if you want to have
-	  Dynamic Stream Compression support
+	  Raven, Navi and Renoir family support for display engine
 
 config DRM_AMD_DC_HDCP
 	bool "Enable HDCP support in DC"