video: tegra: nvmap: track handle's vma list

video: tegra: nvmap: track handle's vma list

Patch includes following nvmap changes:
 - added "pid" field in nvmap_vma_list so now looking at handle's vma list,
   we can say which vma belongs to which process.
 - sorted handle's vma list in ascending order of handle offsets.

Bug 1529015

Change-Id: Ide548e2d97bab8072461c11c9b8865ab4aa01989
Signed-off-by: Maneet Singh <mmaneetsingh@nvidia.com>
Reviewed-on: http://git-master/r/448493
(cherry picked from commit 37132fa461d23552b805e32d268acd14b27588c3)
Reviewed-on: http://git-master/r/448576
Reviewed-by: Automatic_Commit_Validation_User
Reviewed-by: Krishna Reddy <vdumpa@nvidia.com>
Tested-by: Winnie Hsu <whsu@nvidia.com>