sctp: fix checkpatch errors with indent

fix checkpatch errors below:
ERROR: switch and case should be at the same inden
ERROR: code indent should use tabs where possible

Acked-by: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: Wang Weidong <wangweidong1@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/sctp/sm_statefuns.c b/net/sctp/sm_statefuns.c
index 624e4ef..483dcd7 100644
--- a/net/sctp/sm_statefuns.c
+++ b/net/sctp/sm_statefuns.c
@@ -3681,8 +3681,7 @@
 	asconf_ack->dest = chunk->source;
 	sctp_add_cmd_sf(commands, SCTP_CMD_REPLY, SCTP_CHUNK(asconf_ack));
 	if (asoc->new_transport) {
-	        sctp_sf_heartbeat(ep, asoc, type, asoc->new_transport,
-                    commands);
+		sctp_sf_heartbeat(ep, asoc, type, asoc->new_transport, commands);
 		((struct sctp_association *)asoc)->new_transport = NULL;
 	}
 
@@ -6207,7 +6206,7 @@
 	 */
 	if (*sk->sk_prot_creator->memory_pressure) {
 		if (sctp_tsnmap_has_gap(map) &&
-	           (sctp_tsnmap_get_ctsn(map) + 1) == tsn) {
+		    (sctp_tsnmap_get_ctsn(map) + 1) == tsn) {
 			pr_debug("%s: under pressure, reneging for tsn:%u\n",
 				 __func__, tsn);
 			deliver = SCTP_CMD_RENEGE;