m7-common: Enable btlock support

Change-Id: Ia0275d0fde2a5d93f963ea144d26f6fa1b6e874b
m7-common: set BT parameters correctly, disable BT debug

Change-Id: I05b2aa498ebdaf45568d8b0e04b849e5e23bd8b5
m7: Fix BCM4335 chip crashes caused by BT/WiFI concurrency

 * The stock B+ driver works around chip crash that occurs when WiFi is
   on and BT is enabled/disabled by sending a magic patch to the
   hardware.
 * This patch was not in an external file, so some reverse engineering
   was required to extract it and put it in the correct format.
 * Enable the prepatch and enjoy crash-free Bluetooth :)

Change-Id: I1ec8ec345c459ce97cc389d270b025ef61363018