staging: r8188eu: remove rtw_netif_stop_queue wrapper

Remove the rtw_netif_stop_queue wrapper function. Call
netif_tx_stop_all_queues directly.

Signed-off-by: Martin Kaiser <martin@kaiser.cx>
Link: https://lore.kernel.org/r/20220115165536.231210-11-martin@kaiser.cx


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>