add hardware-specific features

Change-Id: I8bf253f095091af0a096993892aa40d2c4d71827
delete BOARD_CUSTOM_BOOTIMG_MK

Change-Id: I3207b49a9a3f64cb5332760012f1e381be507049
add USE_CONTROLLER_BDADDR

Change-Id: I52e75f3b0813a54925073f32fb6915b066d5ab55