drm/amdgpu: Add vega20 ucode loading method

The same as vega10.

Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Feifei Xu <Feifei.Xu@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/amdgpu_ucode.c

@@ -303,6 +303,7 @@ amdgpu_ucode_get_load_type(struct amdgpu_device *adev, int load_type)
 	case CHIP_VEGA10:
 	case CHIP_RAVEN:
 	case CHIP_VEGA12:
+	case CHIP_VEGA20:
 		if (!load_type)
 			return AMDGPU_FW_LOAD_DIRECT;
 		else