qcacmn: Rename hif_callbacks and remove unwanted header files in source files

Rename hif_callbacks structure to hif_driver_state_callbacks and remove
get_monotonic callback and use qdf API to get monotonic time.

Remove following unwanted header files in the hif source files.
osdep.h, athdefs.h, a_types.h, osapi_linux.h.

Change-Id: Ib7a03cab1b056a33b39247989fa3dfca41c85f77
CRs-Fixed: 967765

htc/htc_api.h

@@ -28,7 +28,6 @@
 #ifndef _HTC_API_H_
 #define _HTC_API_H_
 
-#include <athdefs.h>
 #include "osapi_linux.h"
 #include "htc_packet.h"
 #include <htc.h>