staging: r8188eu: ensure mac address buffer is properly aligned

Ensure the mac address buffer in struct eeprom_priv is properly
aligned for use with functions from <linux/etherdevice.h>.

Signed-off-by: Michael Straube <straube.linux@gmail.com>
Link: https://lore.kernel.org/r/20210830121508.6411-3-straube.linux@gmail.com


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