am "add wifi_config.h file"

merged from goog/mirror-m-wireless-internal-release
323ab03 add wifi_config.h file

diff --cc include/hardware_legacy/wifi_hal.h
index 5e445ae,c4e31e8..51bb1a5
--- 1/include/hardware_legacy/wifi_hal.h
--- 2/include/hardware_legacy/wifi_hal.h
+++ b/include/hardware_legacy/wifi_hal.h
@@@ -130,8 -128,7 +130,9 @@@ wifi_error wifi_set_nodfs_flag(wifi_int
  #include "rtt.h"
  #include "tdls.h"
  #include "wifi_logger.h"
+ #include "wifi_config.h"
  
 +#ifdef __cplusplus
 +}
  #endif