msm: 8960: add ath6kl_wlan_power function to control AR6004 gpio

Add necessary functions for AR6004 to control BT related GPIO.
This change will only be used by AR6004

Change-Id: Ia3b7d11f41e836036f5807a2a10265c55741b1b0
Signed-off-by: Ming-yi Lin <mylin@codeaurora.org>
4 files changed