Revert "Revert "ASoC: twl6040: Fix in-call noise/echo for U2""

This reverts commit 7a89bb0eebd6356a79dc10117e1d50dd6c47b200.
Change GPU clock to 384MHz

just like in Gnex, also should not affect battery - voltage remain
unchanged

Change-Id: Ia1636c861bbb76cd1251a04c6acde188113f63a5