wlan: Don't process reg_notifier during SSR.

In case of  SSR, HAL context is made  NULL. So during SSR if
reg_notifir is invoked, driver is accessing HAL context in
sme_GetPhyMode(), leading to crash. Hence make sure
reg_notifier()is not processed during SSR.

Change-Id: I9bc116e94aa2787bc74f99fb5824f50748b9e5ce
CRs-Fixed: 608881
wlan: Adding panic in WDI timeout if SSR is in progress.

This fix will add a panic in WDI timeout if SSR is in progress
(re init sequence is ongoing) immediately after sending FIQ,
SSR does not get triggered again and subsystem does not get
restarted and we can debug the reason for WDI timeout
during re init.

Change-Id: I60ad67718e87e976a83490da0db1a370ce9f0a80
CRs-Fixed:  610527
wlan: Fix for register access in rx low resource timeout

This shall fix the reset when rx low resource timeout
occurs and rx thread access the register during
driver reload.

Change-Id: I6fab24b813195df9b490a26094ca6a1573647036
CRs-Fixed: 607780
wlan: Release 3.2.3.242

Revision 3.2.3.242