staging: r8188eu: remove read_rfreg from struct hal_ops

Remove read_rfreg from struct hal_ops and its wrapper
rtw_hal_read_rfreg(). Call rtl8188e_PHY_QueryRFReg() 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/20210910205033.3778-6-straube.linux@gmail.com


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