net: drop unused LLC-related includes

The bridge and the openvswitch code include <net/llc.h>,
<net/llc_pdu.h> and <linux/llc.h> without using anything out of them.
parse_ethertype() is the one exception: it wants LLC_SAP_SNAP, which
comes from the uAPI header <linux/llc.h> pulls in, so flow.c keeps
that one. The LLC core has leftovers of its own - slab, string,
interrupt and net_namespace - which it has not used in a long time.

None of this is new, the type 2 removal has just shrunk the LLC
headers enough to make it easy to see.

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Acked-by: Aaron Conole <aconole@redhat.com>
Link: https://patch.msgid.link/20260928190800.2521749-4-kuba@kernel.org
Reviewed-by: Nikolay Aleksandrov <razor@blackwall.org>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

net/bridge/br.c

@@ -12,8 +12,6 @@
 #include <linux/netdevice.h>
 #include <linux/etherdevice.h>
 #include <linux/init.h>
-#include <linux/llc.h>
-#include <net/llc.h>
 #include <net/stp.h>
 #include <net/switchdev.h>
 

net/llc/llc_core.c

@@ -7,13 +7,10 @@
  */
 
 #include <linux/module.h>
-#include <linux/interrupt.h>
 #include <linux/if_ether.h>
 #include <linux/netdevice.h>
 #include <linux/slab.h>
-#include <linux/string.h>
 #include <linux/init.h>
-#include <net/net_namespace.h>
 #include <net/llc.h>
 
 static LIST_HEAD(llc_sap_list);

net/llc/llc_input.c

@@ -6,8 +6,6 @@
  * 		 2001-2003 by Arnaldo Carvalho de Melo <acme@conectiva.com.br>
  */
 #include <linux/netdevice.h>
-#include <linux/slab.h>
-#include <net/net_namespace.h>
 #include <net/llc.h>
 #include <net/llc_pdu.h>
 

net/openvswitch/flow.c

@@ -8,7 +8,6 @@
 #include <linux/etherdevice.h>
 #include <linux/if_ether.h>
 #include <linux/if_vlan.h>
-#include <net/llc_pdu.h>
 #include <linux/kernel.h>
 #include <linux/jhash.h>
 #include <linux/jiffies.h>

net/openvswitch/flow_netlink.c

@@ -12,11 +12,9 @@
 #include <linux/etherdevice.h>
 #include <linux/if_ether.h>
 #include <linux/if_vlan.h>
-#include <net/llc_pdu.h>
 #include <linux/kernel.h>
 #include <linux/jhash.h>
 #include <linux/jiffies.h>
-#include <linux/llc.h>
 #include <linux/module.h>
 #include <linux/in.h>
 #include <linux/rcupdate.h>

net/openvswitch/flow_table.c

@@ -11,11 +11,9 @@
 #include <linux/etherdevice.h>
 #include <linux/if_ether.h>
 #include <linux/if_vlan.h>
-#include <net/llc_pdu.h>
 #include <linux/kernel.h>
 #include <linux/jhash.h>
 #include <linux/jiffies.h>
-#include <linux/llc.h>
 #include <linux/module.h>
 #include <linux/in.h>
 #include <linux/rcupdate.h>

net/openvswitch/vport-netdev.c

@@ -9,7 +9,6 @@
 #include <linux/if_bridge.h>
 #include <linux/if_vlan.h>
 #include <linux/kernel.h>
-#include <linux/llc.h>
 #include <linux/rtnetlink.h>
 #include <linux/skbuff.h>
 #include <linux/openvswitch.h>