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: NJoe Perches <joe@perches.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

net/sctp/sm_statefuns.c

@@ -4024,14 +4024,15 @@ sctp_disposition_t sctp_sf_eat_auth(const struct sctp_endpoint *ep,
 	case SCTP_IERROR_AUTH_BAD_KEYID:
 	case SCTP_IERROR_BAD_SIG:
 		return sctp_sf_pdiscard(ep, asoc, type, arg, commands);
-			break;
+
 	case SCTP_IERROR_PROTO_VIOLATION:
 		return sctp_sf_violation_chunklen(ep, asoc, type, arg,
 						  commands);
-			break;
+
 	case SCTP_IERROR_NOMEM:
 		return SCTP_DISPOSITION_NOMEM;
-		default:
+
+	default:			/* Prevent gcc warnings */
 		break;
 	}