staging: r8188eu: EepromAddressSize is set but not used

EepromAddressSize in struct adapter is set but not used. Remove it and
remove the now unused function GetEEPROMSize8188E().

Signed-off-by: Michael Straube <straube.linux@gmail.com>
Link: https://lore.kernel.org/r/20220225120843.10674-2-straube.linux@gmail.com


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