greybus: firmware: firmware's file name is 32 characters long

28 is the wrong value and should be 32 instead.
Reviewed-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

drivers/staging/greybus/firmware.c

@@ -27,7 +27,7 @@ static int download_firmware(struct gb_firmware *firmware, u8 stage)
 {
 	struct gb_connection *connection = firmware->connection;
 	struct gb_interface *intf = connection->bundle->intf;
-	char firmware_name[28];
+	char firmware_name[32];
 
 	/* Already have a firmware, free it */
 	if (firmware->fw)