m7: Enable ioctl interface for BT LPM
* To go with userspace changes
 * BT LPM is now fully working! \o/
msm_serial_hs: Separate Broadcom msm_serial_hs implementation

Change-Id: I0c8f8e8ef6c0ead708a505985e037aafdb5b75d4
block: add FIOPS iosched and set default