orangefs: adjust counting code to recover from 665575cf

A late commit to 6.14-rc7 (665575cf) broke orangefs. This is a several line
adjustment to some counters needed to keep orangefs from deadlocking
when writing page cache data out to the filesystem.

Signed-off-by: Mike Marshall <hubcap@omnibond.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>