media: video: tegra: max77665-flash: trigger mode update

media: video: tegra: max77665-flash: trigger mode update

plus some minor fixes.

Change-Id: I3aaa757068de1047bdd03fcd75b8d53765aea005
Signed-off-by: Charlie Huang <chahuang@nvidia.com>
(cherry picked from commit b1b6b6c3031f45bf55d04e1b1cf6cbb50a150289)
Reviewed on: http://git-master/r/#change,141774
Reviewed-on: http://git-master/r/146032
Reviewed-by: Automatic_Commit_Validation_User
Reviewed-by: Philip Breczinski <pbreczinski@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: Thomas Cherry <tcherry@nvidia.com>
Rebase-Id: R883cee14dbed957fb3b2506aaf1e0fc0fff4d374