staging: r8188eu: Remove some unused and ugly macros

This driver contains a number of macros that are intended to do endian
conversion. The first step in getting rid of them is to delete the
ones that are not used.

Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Link: https://lore.kernel.org/r/20210803135223.12543-10-Larry.Finger@lwfinger.net


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