video: tegra: nvmap: cleanup redundant functions

Removed redundant function unmarshal_user_id() and replaced it with
unmarshal_user_handle() which it internally calls without any other
changes.

Bug: 17453812

Change-Id: I7d998966c593f11a3322b0503ef11311fc1ae5e7
Signed-off-by: Maneet Singh <mmaneetsingh@nvidia.com>
(cherry picked from commit 2d40f8311f73aed11ba7fc55bd04c189c945b731)
4 files changed