p1: increase mdnie pwm from 24 to 28Khz*100

moar love to 7" p1 family screen

Change-Id: Iad958b5801507941703d2853c3ee22884dfd83af
Signed-off-by: Humberto Borba <humberos@gmail.com>
Merge "p1: increase mdnie pwm from 24 to 28Khz*100" into android-4.4