dm: sysreset: Add a standard message when doing reset

It's good to print a message when doing reset.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/sysreset/sysreset-uclass.c b/drivers/sysreset/sysreset-uclass.c
index 840eab6..b918365 100644
--- a/drivers/sysreset/sysreset-uclass.c
+++ b/drivers/sysreset/sysreset-uclass.c
@@ -69,6 +69,8 @@
 
 int do_reset(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 {
+	printf("resetting ...\n");
+
 	sysreset_walk_halt(SYSRESET_COLD);
 
 	return 0;