Remove state_lock_locked and state_unlock_locked

They are only called from state_lock and state_unlock now, so there is
no reason to keep them anywhere.

Signed-off-by: Malahal Naineni <malahal@us.ibm.com>
Acked-by: Matt Benjamin <matt@linuxbox.com>
Acked-by: Venkateswararao Jujjuri (JV) <jvrao@linux.vnet.ibm.com>
Acked-by: Frank S. Filz <ffilzlnx@mindspring.com>