staging: rtl8723bs: remove duplicate names for _rtw_write8()

_rtw_write8() is redefined as rtw_write8() and PlatformEFIOWrite1Byte().
Because rtw_write8() is the only name used in the driver, remove the
duplicate definitions and rename the function from _rtw_write8() to
rtw_write8()

Signed-off-by: Bryan Brattlof <hello@bryanbrattlof.com>
Link: https://lore.kernel.org/r/35ffc9cd5af7009b317361033a6ca5263307d61a.1621361919.git-series.hello@bryanbrattlof.com


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