Revert "BoardConfig: Copy some flags from msm7x30-common"

This reverts commit c075ebb54264ae02127a06421984391d303fd757.
msm8660: set coposistion.type=mdp and mdpcomp.maxlayer=0 build properties.

With these applied along with updated vidc firmware and caf update to kernel
there seems to be less glitching with video playback.

Change-Id: Ifdc8171acfe525c15fcf658df0e2904b67290fb4
BoardConfig: enable refresh rate compile flag to manually specify refresh rate.

Our device uses an outdated kernel and doesnt seem to reprot the correct refresh
rate to gralloc, with this flag and a patch to display-legacy it can be manually
declaired

Change-Id: I4eace3d7a3e42976eb5b0ae973ae263dd1fa7065