net: use SYSCALL_DEFINEx for sys_recv

Make sys_recv a first class citizen by using the SYSCALL_DEFINEx
macro. Besides being cleaner this will also generate meta data
for the system call so tracing tools like ftrace or LTTng can
resolve this system call.
Signed-off-by: NJan Glauber <jan.glauber@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

net/socket.c

@@ -1880,8 +1880,8 @@ SYSCALL_DEFINE6(recvfrom, int, fd, void __user *, ubuf, size_t, size,
  *	Receive a datagram from a socket.
  */
 
-asmlinkage long sys_recv(int fd, void __user *ubuf, size_t size,
-			 unsigned int flags)
+SYSCALL_DEFINE4(recv, int, fd, void __user *, ubuf, size_t, size,
+		unsigned int, flags)
 {
 	return sys_recvfrom(fd, ubuf, size, flags, NULL, NULL);
 }