[NET]: Do not protect sysctl_optmem_max with CONFIG_SYSCTL

The ipv4 and ipv6 protocols need to access it unconditionally.
SYSCTL=n build failure reported by Russell King.

Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/core/sock.c b/net/core/sock.c
index ccd10fd..c135945 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -1719,8 +1719,8 @@
 EXPORT_SYMBOL(sock_wmalloc);
 EXPORT_SYMBOL(sock_i_uid);
 EXPORT_SYMBOL(sock_i_ino);
-#ifdef CONFIG_SYSCTL
 EXPORT_SYMBOL(sysctl_optmem_max);
+#ifdef CONFIG_SYSCTL
 EXPORT_SYMBOL(sysctl_rmem_max);
 EXPORT_SYMBOL(sysctl_wmem_max);
 #endif