FM Radio support

This is a combination of 7 commits:

FM Radio support (part 1)
si4708: configure de-emphasis according to selected band
FM radio support (part 2)
Fix FM audio routing
Build libfmradio by default
si4708: add RDS support
si4708: use mute IOCTL

Change-Id: I9e1c04b4262ad525a2c3adccf1aaead684e528fd
libaudio: update for cm-10.1

Change-Id: Ic37df590d67e328c7365ba010db914ecb7465ebe
disable hw acceleration on lockscreen

Change-Id: I8dca9383a400ee5e8ea4dad9e3d44d1936897c06
update patches