drm/amdgpu: enable Vangogh VCN indirect sram mode

So that uses PSP to initialize HW.

Fixes: 0c2c02b6 ("drm/amdgpu/vcn: add firmware support for dimgrey_cavefish")
Signed-off-by: Leo Liu <leo.liu@amd.com>
Reviewed-by: James Zhu <James.Zhu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -156,6 +156,9 @@ int amdgpu_vcn_sw_init(struct amdgpu_device *adev)
 		break;
 	case IP_VERSION(3, 0, 2):
 		fw_name = FIRMWARE_VANGOGH;
+		if ((adev->firmware.load_type == AMDGPU_FW_LOAD_PSP) &&
+		    (adev->pg_flags & AMD_PG_SUPPORT_VCN_DPG))
+			adev->vcn.indirect_sram = true;
 		break;
 	case IP_VERSION(3, 0, 16):
 		fw_name = FIRMWARE_DIMGREY_CAVEFISH;