wifi: iwlwifi: don't warn during reprobe

During reprobe, the sw state is being destroyd, and so is the
connection. When the peer STA is being removed, the opmode sends a
command to flush the TXQs of the STA and uses iwl_trans_wait_txq_empty.

This one warns if the FW is not alive, but it really shouldn't if
there is a FW error - and return silently instead, just like we do when
sending a hcmd.

Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
Reviewed-by: Johannes Berg <johannes.berg@intel.com>
Link: https://patch.msgid.link/20250205145347.76425b10e5a0.I3bf0de2eb090a8b94c4e36d93dd91df61fadb808@changeid


Signed-off-by: Johannes Berg <johannes.berg@intel.com>