drm/amdgpu: fix ras UE error injection failure issue

The ras command shared memory is allocated from
VRAM and the response status of the command
buffer will not be zero due to gpu being in
fatal error state after ras UE error injection.
Signed-off-by: YiPeng Chai <YiPeng.Chai@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_psp.c

@@ -1630,9 +1630,7 @@ static int psp_ras_send_cmd(struct psp_context *psp,
 
 	switch (cmd) {
 	case TA_RAS_COMMAND__TRIGGER_ERROR:
-		if (ret || psp->cmd_buf_mem->resp.status)
-			ret = -EINVAL;
-		else if (out)
+		if (!ret && out)
 			memcpy(out, &ras_cmd->ras_status, sizeof(ras_cmd->ras_status));
 		break;
 	case TA_RAS_COMMAND__QUERY_ADDRESS: