percpu: percpu_counter_initialized can be boolean

This patch makes percpu_counter_initialized return bool due to this
particular function only using either one or zero as its return
value.

No functional change.

Signed-off-by: guoyayun <guoyayun@cmss.chinamobile.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
1 file changed