add 720x576Over mode for VT1625
add 720x576Over mode for VT1625

freedesktop-unofficial-mirror/openchrome__xf86-video-openchrome,freedesktop-unofficial-mirror/openchrome__xf86-video-openchrome,freedesktop-unofficial-mirror/openchrome__xf86-video-openchrome,freedesktop-unofficial-mirror/openchrome__xf86-video-openchrome