qcacmn: Add unit test framework to validate WLAN suspend/resume features

WLAN suspend/resume feature has tight dependency on APPS platform
suspend/resume support. On new targets APPS suspend/resume is not
supported until target is feature complete. In absence of APPS
suspend/resume support testing WLAN offload features become
difficult. Add unit test framework to test WLAN suspend/resume
features using private IOCTL command by simulating APPS
suspend/resume behaviour.

Trigger WLAN suspend:
iwpriv wlan0 wlan_suspend 0 0

To resume WLAN run a ping test from access point side and very 1st
ping request unicast packet should trigger wake up.

If FW is not waking up APPS then use below command to do a manual
wake up:

Trigger WLAN resume:
iwpriv wlan0 wlan_resume 0 0

This framework is only for SNOC platform.

Change-Id: I177a0047f460aa2a305a9e4e46fbfaa94a81dced
CRs-Fixed: 1042205

hif/inc/hif.h

@@ -615,6 +615,11 @@ uint32_t hif_set_nss_wifiol_mode(struct hif_opaque_softc *osc,
 int32_t hif_get_nss_wifiol_bypass_nw_process(struct hif_opaque_softc *osc);
 #endif
 
+#ifdef WLAN_SUSPEND_RESUME_TEST
+typedef void (*hdd_fake_resume_callback)(uint32_t val);
+void hif_fake_apps_suspend(hdd_fake_resume_callback callback);
+#endif
+
 #ifdef __cplusplus
 }
 #endif