Revert "Makefile: never treat warnings as errors."

This reverts commit 2b443f6ae3ddcc61730928cb8e131d45c56bc6a2.
config: switch ChaCha default governor and frequency

Switched ChaCha governor to OnDemand and changed minimum CPU frequency to 245 mhz. This decreases laggy UI, and fixes the issues where the phone occasionally will not wake up on alarms or incoming calls.
wireless: ifdef bcm4329_204 for chacha & icong only

Change-Id: Ib767a57937b5c0ae9f9bf1662c7b0a68fcb46758