video: mmp: set default pwm value during init to zero

currently when using proximity sensor to control lcd backlight
during voice call we can experience blur once backlight is turned
on.
this happens since the pwm default value is max and is enabled before
pwm is set to the previous value before backlight was turned off.

Change-Id: I12da225a97feb402c4c8ed50b357413723cf6dc7
Signed-off-by: Amit Sharon <asharon@marvell.com>
1 file changed