cmd: scsi: Make private functions static

Two functions should be static because they are not exported to any
other file.
Warnings were reported by sparse C=1.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/cmd/scsi.c b/cmd/scsi.c
index 7442e6a..4213ec8 100644
--- a/cmd/scsi.c
+++ b/cmd/scsi.c
@@ -17,7 +17,7 @@
 /*
  * scsi boot command intepreter. Derived from diskboot
  */
-int do_scsiboot(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[])
+static int do_scsiboot(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[])
 {
 	return common_diskboot(cmdtp, "scsi", argc, argv);
 }
@@ -25,7 +25,7 @@
 /*
  * scsi command intepreter
  */
-int do_scsi(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[])
+static int do_scsi(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[])
 {
 	int ret;