firmware: scmi: smccc transport: simplify probe sequence

Minor simplification in scmi_smccc_probe() exit sequence.

Cc: Simon Glass <sjg@chromium.org>
Cc: Patrice Chotard <patrice.chotard@foss.st.com>
Cc: Patrick Delaunay <patrick.delaunay@foss.st.com>
Signed-off-by: Etienne Carriere <etienne.carriere@linaro.org>
Reviewed-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
diff --git a/drivers/firmware/scmi/smccc_agent.c b/drivers/firmware/scmi/smccc_agent.c
index f0477b9..5e166ca 100644
--- a/drivers/firmware/scmi/smccc_agent.c
+++ b/drivers/firmware/scmi/smccc_agent.c
@@ -65,12 +65,10 @@
 	chan->func_id = func_id;
 
 	ret = scmi_dt_get_smt_buffer(dev, &chan->smt);
-	if (ret) {
+	if (ret)
 		dev_err(dev, "Failed to get smt resources: %d\n", ret);
-		return ret;
-	}
 
-	return 0;
+	return ret;
 }
 
 static const struct udevice_id scmi_smccc_ids[] = {