Add Gamma Control v1

Import gamma_control.c at 5647088 from
https://bitbucket.org/morfic/trinity_four

Change-Id: I33dc38b9148c856cc2d27e8a1b1829609b31646b
Signed-off-by: franciscofranco <franciscofranco.1990@gmail.com>
Signed-off-by: morfic <morfic@gmail.com>