staging: greybus: uart.c: change 'unsigned' to 'unsigned int'

Fixes checkpatch.pl warning:
WARNING: Prefer 'unsigned int' to bare use of 'unsigned'
Signed-off-by: Chaehyun Lim <chaehyun.lim@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/greybus/uart.c

@@ -350,7 +350,7 @@ static int gb_uart_flush(struct gb_tty *gb_tty, u8 flags)
 				 &request, sizeof(request), NULL, 0);
 }
 
-static struct gb_tty *get_gb_by_minor(unsigned minor)
+static struct gb_tty *get_gb_by_minor(unsigned int minor)
 {
 	struct gb_tty *gb_tty;