(0).
General Framework for CFG80211 & HOSTAPD:
  reference framework.patch

(1).For CFG80211 based HOSTAPD:
SoftapController-cfg.cpp
copy it to ./system/netd/SoftapController.cpp


(2).For iwpriv cmds based:
2.1)
SoftapController-iwpriv.cpp
copy it to ./system/netd/SoftapController.cpp
Be care of the RT2870AP.dat file path: change to  /data/misc/wifi/RT2870AP.dat

2.2)
Modified device/ti/panda/BoardConfig.mk
-	BOARD_HOSTAPD_DRIVER            := NL80211
WIFI_DRIVER_MODULE_PATH         := "/system/lib/modules/rt5572sta.ko"
WIFI_AP_DRIVER_MODULE_PATH      := "/system/lib/modules/rt5572ap.ko"
WIFI_DRIVER_MODULE_NAME         := "rt5572sta"
WIFI_AP_DRIVER_MODULE_NAME      := "rt5572ap"

2.3)
Modified Driver's Makefile
- EXTRA_CFLAGS += -DCONFIG_AP_SUPPORT  -DUAPSD_SUPPORT -DMBSS_SUPPORT -DIAPP_SUPPORT -DDBG -DDOT1X_SUPPORT -DAP_SCAN_SUPPORT -DHOSTAPD_SUPPORT -DRT_CFG80211_SUPPORT -RFKILL_HW_SUPPORT
+ EXTRA_CFLAGS += -DCONFIG_AP_SUPPORT  -DUAPSD_SUPPORT -DMBSS_SUPPORT -DIAPP_SUPPORT -DDBG -DDOT1X_SUPPORT -DAP_SCAN_SUPPORT RFKILL_HW_SUPPORT