page_pool: Add recycle stats

mainline inclusion
from mainline-v5.18-rc1
commit ad6fa1e1
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I8BNYE
CVE: NA

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ad6fa1e1ab1b8164f1ba296b1b4dc556a483bcad



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Add per-cpu stats tracking page pool recycling events:
	- cached: recycling placed page in the page pool cache
	- cache_full: page pool cache was full
	- ring: page placed into the ptr ring
	- ring_full: page released from page pool because the ptr ring was full
	- released_refcnt: page released (and not recycled) because refcnt > 1

Signed-off-by: Joe Damato <jdamato@fastly.com>
Acked-by: Jesper Dangaard Brouer <brouer@redhat.com>
Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>