staging: r8188eu: remove mgnt_xmit from struct hal_ops

Remove mgnt_xmit from struct hal_ops and its wrapper
rtw_hal_mgnt_xmit(). Call rtl8188eu_mgnt_xmit() directly instead.

Acked-by: Fabio M. De Francesco <fmdefrancesco@gmail.com>
Signed-off-by: Michael Straube <straube.linux@gmail.com>
Link: https://lore.kernel.org/r/20210910205033.3778-2-straube.linux@gmail.com


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