drm/amdgpu: implement GFX 9.0 support (v2)

Add support for gfx v9.0.

v2: update golden settings from Ken

Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Ken Wang <Qingqing.Wang@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/Makefile

@@ -64,7 +64,8 @@ amdgpu-y += \
 # add GFX block
 amdgpu-y += \
 	amdgpu_gfx.o \
-	gfx_v8_0.o
+	gfx_v8_0.o \
+	gfx_v9_0.o
 
 # add async DMA block
 amdgpu-y += \