Support LGE's version of the bcm4329 SoftAP

LGE has a number of SDIO and power-management patches on top of
bcm4329, which include separate pairs of functions to start/stop
the driver in STA or AP mode. Use LGE's SOFTAP priv functions if
WIFI_DRIVER_HAS_LGE_SOFTAP is true

Change-Id: Id90a679794f12bfd3a35f9e0608288ae72cefd5f