wlan: Change the behavior of isLoadUnloadInProgres

Some APIs (wlan_hdd_linux_reg_notifier) can be allowed to execute if
driver load is in progress but should be blocked if driver unload is in
progress, to be able to cater to the needs of such APIs change
isLoadUnloadInProgress so that it can distinguish between driver load
and unload.

Change-Id: I80d42a2b1cc2e161c5405bcc8440f3fb02c6d4a7
CRs-Fixed: 629537
wlan: ATT uverse AP probe resoponse contains SPACE as SSID

ATT Uverse AP sending the probe response with space as SSID for
a broadcast SSID probe request when it is configured as hidden SSID.
This result in the scan result with actual SSID is overwritten with
the SSID as "space".As part of this change added the logic to consider
the SSID as NULL when SSID is recieved as space.

Change-Id: I958d604a889b7effff5465cce57fbacb353700db
CRs-Fixed: 639555
wlan: fix format specifier in logs

This is to remove the compiler warnings on a 64 bit machine. use a
generic specifier like %zu instead of %d to print size_t

Change-Id: I3a10365ea62639f5e5897e6d6f3f56a8c30db1cf
CRs-Fixed: 639770
wlan: Revision 3.2.3.286

Revision 3.2.3.286

Change-Id: Ifa5a373820c9cf38e1e35a282b661bafa4d6e9dc