msm: vidc: fix useltr control in driver

when useltr command is set the control is expected to be a bitwise
operator but driver assumes this to be a integer and then converts
the integer to bitshifted value before sending to firmware. This
change fixes the issue seen earlier.

Change-Id: I48d97cdf0ccb4c834881e01bf0746097293c390a
Signed-off-by: Ashray Kulkarni <ashrayk@codeaurora.org>