gpu: nvgpu: implement mapping for sparse allocation

gpu: nvgpu: implement mapping for sparse allocation

Implement support for partial buffer mappings.

Whitelist gr_pri_bes_crop_hww_esr accessed by
fec during sparse texture initialization.

bug 1456562
bug 1369014
bug 1361532

Change-Id: Ib0d1ec6438257ac14b40c8466b37856b67e7e34d
Signed-off-by: Kirill Artamonov <kartamonov@nvidia.com>
Reviewed-on: http://git-master/r/375012
(cherry picked from commit a24470f69961508412402b9b06d5b71fbf6f7549)
Reviewed-on: http://git-master/r/601754
Tested-by: Rajkumar Kasirajan <rkasirajan@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: Winnie Hsu <whsu@nvidia.com>