wcnss: Add PLL status register to register dump list

When a WDI timeout or Watchdog bite happens at WCNSS, log certain WCNSS
register before SSR. Dumping these registers before performing the reset
helps to debug the root cause of the timeout or bite. Add PLL status to
the register dump, recently we have seen WCNSS reset failures becuase
of PLL lock issues.

Change-Id: I7557a46260e6dbd888b4bb1191442fda0bc3c986
Signed-off-by: Sameer Thalappil <sameert@codeaurora.org>