drm/amdgpu: add vega12 ucode loading method

Same as vega10.

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

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

@@ -271,6 +271,7 @@ amdgpu_ucode_get_load_type(struct amdgpu_device *adev, int load_type)
 			return AMDGPU_FW_LOAD_SMU;
 	case CHIP_VEGA10:
 	case CHIP_RAVEN:
+	case CHIP_VEGA12:
 		if (!load_type)
 			return AMDGPU_FW_LOAD_DIRECT;
 		else