staging: iio: light: iqs253: disable pm ops

staging: iio: light: iqs253: disable pm ops

This is SW WAR for unexpected wake-ups from
proximity sensor.

Bug 1458603

Change-Id: I2a4cfd43f5c72e933b82c343fcf52034e0b6368f
Signed-off-by: Sri Krishna chowdary <schowdary@nvidia.com>
Reviewed-on: http://git-master/r/368524
(cherry picked from commit c6b46cc5f8d5d09deb5ab120b307aa592e632773)
Reviewed-on: http://git-master/r/369751
(cherry picked from commit b5cf7cd0061559ed20f0a581fb3d133952cd5f51)
Reviewed-on: http://git-master/r/374285
Reviewed-by: Automatic_Commit_Validation_User
Reviewed-by: Sachin Nikam <snikam@nvidia.com>