wifi: iwlwifi: mld: inform trans on init failure

If starting the op mode failed, the opmode memory is being freed,
so trans->op_mode needs to be NULLified. Otherwise, trans will access
already freed memory.
Call iwl_trans_op_mode_leave in that case.

Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
Reviewed-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Reviewed-by: Johannes Berg <johannes.berg@intel.com>
Link: https://patch.msgid.link/20250423091408.c7e178748ef7.Ifaf15bdd8ef8c59e04effbd2e7aa0034b30eeacb@changeid


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