mdss: display: remove checking of pwm gpio from pwm config

Since pwm back light is driven by pwm lpg channel, pmic_gpio
is not needed. Therefore remove checking of pmic_gpio.

CRs-Fixed: 575245
Change-Id: I7027c71322d122617eb9cbce839c614f2294a0e7
Signed-off-by: Kuogee Hsieh <khsieh@codeaurora.org>
1 file changed