n1: fix MAC config and device cleanup

Use the correct MAC for wifi
This is stored in /data/opponvitems/4678 and will
be patched into the wifi config file
/system/etc/firmware/wlan/prima/WCNSS_qcom_cfg.ini on boot

Cleanup BT config and remove useless bdAddrLoader

Change-Id: I469edacda4ab0649151342dd936b987c39ee817b