staging: r8188eu: remove hal_ops

Remove the last pointer hal_deinit from struct hal_ops and call
rtl8188eu_hal_deinit() directly. Remove the now empty struct
hal_ops.

Signed-off-by: Michael Straube <straube.linux@gmail.com>
Link: https://lore.kernel.org/r/20211007103943.8433-5-straube.linux@gmail.com


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