[Xorg-driver-geode] Scratch Pixmap referrence

[Cui, Hunk]

Hi, Mart & Frank,
	There is some rotate scratch pixmap reference info from ATI and
Intel graphic driver.

Intel:
	
http://cgit.freedesktop.org/xorg/driver/xf86-video-intel/commit/?id=c175
5599db1d9a20954b84ccc07afd892bb6ac9e

ATI:
	
http://cgit.freedesktop.org/xorg/driver/xf86-video-ati/commit/?id=a493fe
b94c0d84aaf5bfd84c6940d7f03974dd86

Thanks,
Hunk Cui