Fix checkpatch ERROR, CHECK, and WARNING messages for core/rtw_rf.c

Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Fix checkfile ERROR and CHECK messages in core/rtw_recv.c

Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Fix checkfile ERROR and CHECK problems in core/rtw_pwrctrl.c

Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Fix most checkfile ERROR and CHECK problems in core/rtw_p2p.c

Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Fix checkfile ERROR and CHECK messages in core/rtw_mlme_ext.c

Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
rtl8192du: use generic if_ether.h

Signed-off-by: Stefan Lippers-Hollmann <s.l-h@gmx.de>
rtl8192du: use generic ip.h

Signed-off-by: Stefan Lippers-Hollmann <s.l-h@gmx.de>