staging: r8188eu: remove unused enums from rtl8188e_hal.h

After removing MultiFunc and RegulatorMode from struct hal_data_8188e
the enums rt_multi_func and rt_regulator_mode are unused now, remove
them.

Acked-by: Fabio M. De Francesco <fmdefrancesco@gmail.com>
Signed-off-by: Michael Straube <straube.linux@gmail.com>
Link: https://lore.kernel.org/r/20210915090156.4169-4-straube.linux@gmail.com


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