staging: rtl8188eu: Remove duplicate incusion in drv_types.h

wlan_bssdef.h was included twice.

Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Acked-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>