cnss2: Ignore QMI mode off request during recovery

If device has already crashed and recovery is in progress, QMI mode
off request will be timed out anyway, so ignore sending it.

Change-Id: Ic1395cd9a6497f25736e37d7bdfffae8f8d1d304
Signed-off-by: Yue Ma <yuem@codeaurora.org>