cnss2: Remove recovery check in crash shutdown

The main purpose previously for recovery check in crash shutdown
function is to avoid collecting firmware dump twice if there is a
kernel panic happens during recovery. Currently firmware dump
collection function itself will check if dump has been collected
or not so the recovery check is redundant. Hence remove it.

Change-Id: I560f9c7502bc7f59cf6856ec80ed4ab73f0a2cbe
Signed-off-by: Yue Ma <yuem@codeaurora.org>