net: dsa: include dsa.h only once

The public include/net/dsa.h file is meant for DSA drivers, while all
DSA core files share a common private header net/dsa/dsa_priv.h file.

Ensure that dsa_priv.h is the only DSA core file to include net/dsa.h,
and add a new line to separate absolute and relative headers at the same
time.
Signed-off-by: NVivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

net/dsa/dsa.c

@@ -24,7 +24,7 @@
 #include <linux/phy_fixed.h>
 #include <linux/gpio/consumer.h>
 #include <linux/etherdevice.h>
-#include <net/dsa.h>
+
 #include "dsa_priv.h"
 
 static struct sk_buff *dsa_slave_notag_xmit(struct sk_buff *skb,

net/dsa/dsa2.c

@@ -18,7 +18,7 @@
 #include <linux/rtnetlink.h>
 #include <linux/of.h>
 #include <linux/of_net.h>
-#include <net/dsa.h>
+
 #include "dsa_priv.h"
 
 static LIST_HEAD(dsa_switch_trees);

net/dsa/dsa_priv.h

@@ -14,6 +14,7 @@
 #include <linux/phy.h>
 #include <linux/netdevice.h>
 #include <linux/netpoll.h>
+#include <net/dsa.h>
 
 struct dsa_device_ops {
 	struct sk_buff *(*xmit)(struct sk_buff *skb, struct net_device *dev);

net/dsa/legacy.c

@@ -22,7 +22,7 @@
 #include <linux/sysfs.h>
 #include <linux/phy_fixed.h>
 #include <linux/etherdevice.h>
-#include <net/dsa.h>
+
 #include "dsa_priv.h"
 
 /* switch driver registration ***********************************************/

net/dsa/slave.c

@@ -17,13 +17,13 @@
 #include <linux/of_mdio.h>
 #include <linux/mdio.h>
 #include <linux/list.h>
-#include <net/dsa.h>
 #include <net/rtnetlink.h>
 #include <net/switchdev.h>
 #include <net/pkt_cls.h>
 #include <net/tc_act/tc_mirred.h>
 #include <linux/if_bridge.h>
 #include <linux/netpoll.h>
+
 #include "dsa_priv.h"
 
 static bool dsa_slave_dev_check(struct net_device *dev);

net/dsa/switch.c

@@ -12,7 +12,8 @@
 
 #include <linux/netdevice.h>
 #include <linux/notifier.h>
-#include <net/dsa.h>
+
+#include "dsa_priv.h"
 
 static int dsa_switch_bridge_join(struct dsa_switch *ds,
 				  struct dsa_notifier_bridge_info *info)

net/dsa/tag_brcm.c

@@ -12,7 +12,7 @@
 #include <linux/etherdevice.h>
 #include <linux/list.h>
 #include <linux/slab.h>
-#include <net/dsa.h>
+
 #include "dsa_priv.h"
 
 /* This tag length is 4 bytes, older ones were 6 bytes, we do not

net/dsa/tag_dsa.c

@@ -11,7 +11,7 @@
 #include <linux/etherdevice.h>
 #include <linux/list.h>
 #include <linux/slab.h>
-#include <net/dsa.h>
+
 #include "dsa_priv.h"
 
 #define DSA_HLEN	4

net/dsa/tag_edsa.c

@@ -11,7 +11,7 @@
 #include <linux/etherdevice.h>
 #include <linux/list.h>
 #include <linux/slab.h>
-#include <net/dsa.h>
+
 #include "dsa_priv.h"
 
 #define DSA_HLEN	4

net/dsa/tag_lan9303.c

@@ -14,7 +14,7 @@
 #include <linux/etherdevice.h>
 #include <linux/list.h>
 #include <linux/slab.h>
-#include <net/dsa.h>
+
 #include "dsa_priv.h"
 
 /* To define the outgoing port and to discover the incoming port a regular

net/dsa/tag_mtk.c

@@ -13,7 +13,7 @@
  */
 
 #include <linux/etherdevice.h>
-#include <net/dsa.h>
+
 #include "dsa_priv.h"
 
 #define MTK_HDR_LEN		4

net/dsa/tag_qca.c

@@ -12,7 +12,7 @@
  */
 
 #include <linux/etherdevice.h>
-#include <net/dsa.h>
+
 #include "dsa_priv.h"
 
 #define QCA_HDR_LEN	2

net/dsa/tag_trailer.c

@@ -11,7 +11,7 @@
 #include <linux/etherdevice.h>
 #include <linux/list.h>
 #include <linux/slab.h>
-#include <net/dsa.h>
+
 #include "dsa_priv.h"
 
 static struct sk_buff *trailer_xmit(struct sk_buff *skb, struct net_device *dev)