ocfs2: adjust switch_case syntax at o2net_state_change()

Adjust switch..case syntax at o2net_state_change to meet the kernel coding
standard.

s/printk/pr_info/.

[akpm@linux-foundation.org: revert pr_foo() change]
Signed-off-by: NJie Liu <jeff.liu@oracle.com>
Acked-by: NJoel Becker <jlbec@evilplan.org>
Cc: Gurudas Pai <gurudas.pai@oracle.com>
Cc: Mark Fasheh <mfasheh@suse.com>
Cc: Noboru Iwamatsu <n_iwamatsu@jp.fujitsu.com>
Cc: Srinivas Eeeda <srinivas.eeda@oracle.com>
Cc: Sunil Mushran <sunil.mushran@gmail.com>
Cc: Tao Ma <tm@tao.ma>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>