gpu: nvgpu: update regops whitelist

gpu: nvgpu: update regops whitelist

Remove an undesired register from the regops whitelist.

Bug 1589712

Change-Id: I76e8ff1f4b68d6d5ce2c11adc08d984df7883e5e
Signed-off-by: Matt Craighead <mcraighead@nvidia.com>
Reviewed-on: http://git-master/r/663371
(cherry picked from commit 573a71d052ac18d34b5f4e984f8684cedea0396d)
Reviewed-on: http://git-master/r/663998
Reviewed-by: Automatic_Commit_Validation_User
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>
Reviewed-by: Eric Brower <ebrower@nvidia.com>
Reviewed-by: Matthew Pedro <mapedro@nvidia.com>