staging: wean rtl8712 off of its ancient duplicate of ip.h

This driver should not be carrying around ancient copies of
headers like <linux/ip.h> for its own use.  Mapping it onto
the mainline one uncovers no build issues.

Cc: Larry Finger <Larry.Finger@lwfinger.net>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>

drivers/staging/rtl8712/rtl8712_recv.c

@@ -29,12 +29,12 @@
 #define _RTL8712_RECV_C_
 
 #include <linux/if_ether.h>
+#include <linux/ip.h>
 
 #include "osdep_service.h"
 #include "drv_types.h"
 #include "recv_osdep.h"
 #include "mlme_osdep.h"
-#include "ip.h"
 #include "ethernet.h"
 #include "usb_ops.h"
 #include "wifi.h"

drivers/staging/rtl8712/rtl871x_recv.c

@@ -28,6 +28,7 @@
 
 #define _RTL871X_RECV_C_
 
+#include <linux/ip.h>
 #include <linux/slab.h>
 #include <linux/if_ether.h>
 #include <linux/kmemleak.h>
@@ -36,7 +37,6 @@
 #include "drv_types.h"
 #include "recv_osdep.h"
 #include "mlme_osdep.h"
-#include "ip.h"
 #include "ethernet.h"
 #include "usb_ops.h"
 #include "wifi.h"

drivers/staging/rtl8712/xmit_linux.c

@@ -29,13 +29,12 @@
 #define _XMIT_OSDEP_C_
 
 #include <linux/usb.h>
+#include <linux/ip.h>
 #include <linux/if_ether.h>
 
 #include "osdep_service.h"
 #include "drv_types.h"
 
-
-#include "ip.h"
 #include "rtl871x_byteorder.h"
 #include "wifi.h"
 #include "mlme_osdep.h"