staging: r8188eu: Add files for new driver - part 28

This commit adds files include/rtw_mlme.h, include/rtw_mlme_ext.h,
include/rtw_mp.h, include/rtw_mp_ioctl.h, and include/rtw_mp_phy_regdef.h.

Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>