drm/amdgpu/psp: Fix can't detect psp INVOKE command failed

There isn't ucode when executing INVOKE command, so current code can't
check the failure of INVOKE command.

Remove the ucode check.
Signed-off-by: Xiangliang Yu <Xiangliang.Yu@amd.com>
Reviewed-by: Feifei Xu <Feifei.Xu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -140,10 +140,13 @@ psp_cmd_submit_buf(struct psp_context *psp,
 	while (*((unsigned int *)psp->fence_buf) != index)
 		msleep(1);
 
-	/* the status field must be 0 after FW is loaded */
-	if (ucode && psp->cmd_buf_mem->resp.status) {
-		DRM_ERROR("failed loading with status (%d) and ucode id (%d)\n",
-			  psp->cmd_buf_mem->resp.status, ucode->ucode_id);
+	/* the status field must be 0 after psp command completion */
+	if (psp->cmd_buf_mem->resp.status) {
+		if (ucode)
+			DRM_ERROR("failed to load ucode id (%d) ",
+				  ucode->ucode_id);
+		DRM_ERROR("psp command failed and response status is (%d)\n",
+			  psp->cmd_buf_mem->resp.status);
 		return -EINVAL;
 	}