netlink: rename ssk to sk in struct netlink_skb_params

Memory mapped netlink needs to store the receiving userspace socket
when sending from the kernel to userspace. Rename 'ssk' to 'sk' to
avoid confusion.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/linux/netlink.h b/include/linux/netlink.h
index e0f746b..d8e9264 100644
--- a/include/linux/netlink.h
+++ b/include/linux/netlink.h
@@ -19,7 +19,7 @@
 	struct scm_creds	creds;		/* Skb credentials	*/
 	__u32			portid;
 	__u32			dst_group;
-	struct sock		*ssk;
+	struct sock		*sk;
 };
 
 #define NETLINK_CB(skb)		(*(struct netlink_skb_parms*)&((skb)->cb))