firmware: scmi: use scmi_proto_driver_get() function to get SCMI protocol driver

If there is a SoC specific SCMI protocol driver, using
scmi_proto_driver_get() function can avoid to add SoC specific code to
scmi_agent-uclass.c.

Signed-off-by: Alice Guo <alice.guo@nxp.com>
diff --git a/drivers/reset/reset-scmi.c b/drivers/reset/reset-scmi.c
index 6dc1fcb..f92a9e3 100644
--- a/drivers/reset/reset-scmi.c
+++ b/drivers/reset/reset-scmi.c
@@ -9,6 +9,7 @@
 #include <errno.h>
 #include <reset-uclass.h>
 #include <scmi_agent.h>
+#include <scmi_agent-uclass.h>
 #include <scmi_protocols.h>
 #include <asm/types.h>
 
@@ -81,3 +82,10 @@
 	.ops = &scmi_reset_domain_ops,
 	.probe = scmi_reset_probe,
 };
+
+static struct scmi_proto_match match[] = {
+	{ .proto_id = SCMI_PROTOCOL_ID_RESET_DOMAIN },
+	{ /* Sentinel */ }
+};
+
+U_BOOT_SCMI_PROTO_DRIVER(scmi_reset_domain, match);