drm/vmwgfx: add support for new TTM fault callback V5
drm/vmwgfx: add support for new TTM fault callback V5

This add the support for the new fault callback, does change anything
from driver point of view.

Improvement: store the aperture base in a variable so that we don't
call a function to get it on each fault.

Patch hasn't been tested.

V2 don't derefence bo->mem.mm_node as it's not NULL only for
   VRAM or GTT
V3 update after io_mem_reserve/io_mem_free callback balancing
V4 callback has to ioremap
V5 ioremap is done by TTM

Signed-off-by: Jerome Glisse <0620d428a1bd3756b1319066bf466b3b8be0b2b2@redhat.com>
Reviewed-by: Thomas Hellstrom <a26490dfbee4be3d38287ad6448444504f58193c@vmware.com>
Signed-off-by: Dave Airlie <f2295d84e358395675bc8031be58672073ae065e@redhat.com>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas