SUNRPC: rearrange RPC sockets definitions

To prepare for including non-sockets-based RPC transports, move the
sockets-dependent definitions into their own file.

Signed-off-by: Tom Talpey <tmt@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
diff --git a/net/sunrpc/sunrpc_syms.c b/net/sunrpc/sunrpc_syms.c
index 384c4ad5..33d89e8 100644
--- a/net/sunrpc/sunrpc_syms.c
+++ b/net/sunrpc/sunrpc_syms.c
@@ -20,7 +20,7 @@
 #include <linux/sunrpc/auth.h>
 #include <linux/workqueue.h>
 #include <linux/sunrpc/rpc_pipe_fs.h>
-
+#include <linux/sunrpc/xprtsock.h>
 
 /* RPC scheduler */
 EXPORT_SYMBOL(rpc_execute);