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 --cc net/sctp/auth.c
Simple merge

diff --cc net/sctp/input.c
Simple merge

diff --cc net/sctp/output.c
Simple merge

diff --cc net/sctp/sm_make_chunk.c
Simple merge

diff --cc net/sctp/sm_statefuns.c
Simple merge

diff --cc net/sctp/sm_statetable.c
Simple merge