sctp: Reduce switch/case indent

Make the case labels the same indent as the switch.

git diff -w shows useless break;s removed after returns
and a comment added to an unnecessary default: break;
because of a dubious gcc warning.

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/sctp/socket.c b/net/sctp/socket.c
index fd31b36..1c6aec1 100644
--- a/net/sctp/socket.c
+++ b/net/sctp/socket.c
@@ -3257,11 +3257,11 @@
 		return -EFAULT;
 
 	switch (val.sauth_chunk) {
-		case SCTP_CID_INIT:
-		case SCTP_CID_INIT_ACK:
-		case SCTP_CID_SHUTDOWN_COMPLETE:
-		case SCTP_CID_AUTH:
-			return -EINVAL;
+	case SCTP_CID_INIT:
+	case SCTP_CID_INIT_ACK:
+	case SCTP_CID_SHUTDOWN_COMPLETE:
+	case SCTP_CID_AUTH:
+		return -EINVAL;
 	}
 
 	/* add this chunk id to the endpoint */