[PATCH] drm fixup pci gart settings

Fix the PCIGART increment and add a cpu_to_le32 for ppc (untested)

Paulus was unsure if we need to cpu_to_le32 but the old code was definitely
wrong, so make it consistent and let the PPC guys figure it out later.

Signed-off-by: Dave Airlie <airlied@linux.ie>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Dave Jones <davej@codemonkey.org.uk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>