gpu: nvgpu: Initialize FECS explicitly on recovery

gpu: nvgpu: Initialize FECS explicitly on recovery

Instead of calling second phase of PMU boot sequence, initialize FECS
directly.

Change-Id: I7f9de0c5ec42049033839d244979f3f3daabf317
Signed-off-by: Terje Bergstrom <tbergstrom@nvidia.com>
Reviewed-on: http://git-master/r/410204
(cherry picked from commit 5a631edd5cf05a4b8c5e8b049256a0e190964859)
Reviewed-on: http://git-master/r/416209
Reviewed-by: Automatic_Commit_Validation_User