[iwm] Fix iwm_mvm_send_cmd_pdu(_status) declarations. Make id a uint32_t.
- This fixes cases where the group id of wide commands got lost, e.g. this happened to the IWM_SCAN_ABORT_UMAC command.
Obtained from: dragonflybsd.git 71310fab0caca79bb5da43d9d642e77a4c27eea2