Revert "ARM: dts: hammerhead: Change i2c clock rate to 19.2 MHz"

This reverts commit 601a322bea4851476aae5b9b919a88615f81e5b5.
Revert "GPU: optimize build with -Ofast"

This reverts commit 40ce2e0ea294a41ee7a17fed07dd5fc31b04ee42.
Revert "makefile: build with -Ofast"

This reverts commit 30fbcf1182d07d73f62dd39f4f36257a25c36a81.
Revert "msm: mdss: Turn off backlight while power off"

This reverts commit 84692344583991d679c7c4e1f1bffe439f536bfe.