Partial revert of ARM optimiations

These probably don't improve on performance much and might cause
issues with audio quality
Signed-off-by: Paul Beeler <sparksco@gmail.com>
Add -O3 compile flag as a BoardConfig option
TARGET_arm_CFLAGS := -fno-tree-vectorize

Needed to fix bluetooth not working on grouper/tilapia
Merge remote-tracking branch 'RasSaber/jb-mr1.1' into HEAD