wlan: Update BT enable/disable status to firmware

Update BT enable/disable status coming from
wcnss to firmware.

Usage:
Enable BT:
$ echo BT_ENABLED 1 BLE 0 A2DP 0 SCO 0 >
	/sys/devices/platform/soc/a000000.qcom,wcnss-wlan/bt_profile

Disable BT:
$ echo BT_ENABLED 0 BLE 0 A2DP 0 SCO 0 >
	/sys/devices/platform/soc/a000000.qcom,wcnss-wlan/bt_profile

Change-Id: I57df353427cb33bef9ebe904db071692294e4c86
CRs-Fixed: 2807024