video: tegra: dp: update link enable/disable

video: tegra: dp: update link enable/disable

Update SOR attach sequence and implement SOR detach
sequence according to recommended guidelines.

Change-Id: Id0d2395508a6e61847e1890ea85d4025300691eb
Signed-off-by: Daniel Solomon <daniels@nvidia.com>
Reviewed-on: http://git-master/r/381762
Reviewed-by: Automatic_Commit_Validation_User
GVS: Gerrit_Virtual_Submit
Reviewed-by: Animesh Kishore <ankishore@nvidia.com>
Reviewed-by: Venkat Moganty <vmoganty@nvidia.com>