icnss: Add support for host initiated recovery

Add an API that can trigger WLAN PDR. WLAN host driver can use
this API to trigger PDR in the cases where it fails to communicate
with FW over it's native copy engine interface.

CRs-Fixed: 1110381
Change-Id: I7a076ba023b3e48c9e5473ec4895f50c71816831
Signed-off-by: Sameer Thalappil <sameert@codeaurora.org>