base-files: fix off-by-one in counting seconds for factory reset

There was a mismatch between indicating factory reset and code actually
starting it. After 5 seconds status LED started blinking rapidly letting
user know it's ready to release reset button. In practice button had to
stay pressed for another second in order to relly start the process.

Signed-off-by: Rafał Miłecki <rafal@milecki.pl>

package/base-files/files/etc/rc.button/reset

@@ -20,7 +20,7 @@ released)
 		echo "REBOOT" > /dev/console
 		sync
 		reboot
-	elif [ "$SEEN" -gt 5 -a -n "$OVERLAY" ]
+	elif [ "$SEEN" -ge 5 -a -n "$OVERLAY" ]
 	then
 		echo "FACTORY RESET" > /dev/console
 		jffs2reset -y && reboot &