wcnss: additional checks to prevent unclocked register access

In case of a WDOG bite the WCNSS may not be propperly clocked,
make sure that all clock gating registers are checked before
accessing other registers for debug purpose.

Change-Id: I877da81fb10aa73926269ce5874b9a63ec6b30de
CRs-Fixed: 555035
Signed-off-by: Mihir Shete <smihir@codeaurora.org>