raw/rawv6.h: Remove extern from function prototypes

There are a mix of function prototypes with and without extern
in the kernel sources.  Standardize on not using extern for
function prototypes.

Function prototypes don't need to be written with extern.
extern is assumed by the compiler.  Its use is as unnecessary as
using auto to declare automatic/local variables in a block.
Signed-off-by: NJoe Perches <joe@perches.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

include/net/raw.h

@@ -26,7 +26,7 @@ extern struct proto raw_prot;
 void raw_icmp_error(struct sk_buff *, int, u32);
 int raw_local_deliver(struct sk_buff *, int);
 
-extern int 	raw_rcv(struct sock *, struct sk_buff *);
+int raw_rcv(struct sock *, struct sk_buff *);
 
 #define RAW_HTABLE_SIZE	MAX_INET_PROTOS
 
@@ -36,8 +36,8 @@ struct raw_hashinfo {
 };
 
 #ifdef CONFIG_PROC_FS
-extern int  raw_proc_init(void);
-extern void raw_proc_exit(void);
+int raw_proc_init(void);
+void raw_proc_exit(void);
 
 struct raw_iter_state {
 	struct seq_net_private p;

include/net/rawv6.h

@@ -7,8 +7,7 @@ void raw6_icmp_error(struct sk_buff *, int nexthdr,
 		u8 type, u8 code, int inner_offset, __be32);
 bool raw6_local_deliver(struct sk_buff *, int);
 
-extern int			rawv6_rcv(struct sock *sk,
-					  struct sk_buff *skb);
+int rawv6_rcv(struct sock *sk, struct sk_buff *skb);
 
 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
 int rawv6_mh_filter_register(int (*filter)(struct sock *sock,