p1: add more love to 7" lcd

lvds:  reduce power consumption from 3.3mV to 3.0mV
       3.0 can be used as well (source: lvds datasheet)
       increase lcd frequency from 60Hz to 67.2Hz
       main reason: saving battery life

mdnie: increase mdnie clock freq from 2.8MHz to 3.0Mhz
       required for 7" screensize
       main reason: bring back fast transitions and animations

Signed-off-by: Humberto Borba <humberos@gmail.com>
Change-Id: Ic79301f03f6ae798f20584e6b4a294901f3e67e9