cnss2: Add support for pin connect results

Result of the pin connectivity tests performed at WLAN firmware is
sent to host. Add a handler to process and save this pin connectivity
results.

CRs-Fixed: 2008726
Change-Id: If4407a117dccf5f6fabb69050da2a8f262495348
Signed-off-by: Sameer Thalappil <sameert@codeaurora.org>