[NET]: Small cleanup to socket initialization

sock_init can be done as a core_initcall instead of calling
it directly in init/main.c

Also I removed an out of date #ifdef.

Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

init/main.c

@@ -47,7 +47,6 @@
 #include <linux/rmap.h>
 #include <linux/mempolicy.h>
 #include <linux/key.h>
-#include <net/sock.h>
 
 #include <asm/io.h>
 #include <asm/bugs.h>
@@ -614,9 +613,6 @@ static void __init do_basic_setup(void)
 	sysctl_init();
 #endif
 
-	/* Networking initialization needs a process context */ 
-	sock_init();
-
 	do_initcalls();
 }