When mapping buffer on a fixed address, ensure that the alignment of
buffer and the address are compabile. When freeing, retrieve page
size from the VA instead of choosing it again.
Bug 1605769
Change-Id: I4f73453996cd53a912b6a414caa41563cde28da7
Signed-off-by: Terje Bergstrom <tbergstrom@nvidia.com>
Reviewed-on: http://git-master/r/725764