Makefile: Use O3 optimizations

Change-Id: I2ee8ec69b9bc6fbc6de096f4fcd8190946123d2b
USB force fast charging

Change-Id: Ida059b477da85992122d4db5cd2c126a5dac9426
bcmdhd: Enable Ad-Hoc (IBSS) mode

Change-Id: Ie5c8c47bb9f3af5c61ddb5a9788471c73c29bcd1
change pref

Change-Id: I9c2287de8f82599d73febb70a3291a2a07edd53e