m7: Fix CABC support

 * Option was missing in Kconfig, restore it and regenerate the config.

Change-Id: I6daac11c9014abb207721f4d4203eba55e251279

Conflicts:
	arch/arm/configs/cyanogenmod_m7_defconfig
misc: Fix GCC warnings

Change-Id: If5d614236f08e67f0de90fb5b2fa3bfc0dc2b72b