netfs: Revert "netfs: Switch debug logging to pr_debug()"

Revert commit 163eae0f

 to get back the
original operation of the debugging macros.

Signed-off-by: David Howells <dhowells@redhat.com>
Link: https://lore.kernel.org/r/20240608151352.22860-2-ukleinek@kernel.org
Link: https://lore.kernel.org/r/1410685.1721333252@warthog.procyon.org.uk


cc: Uwe Kleine-König <ukleinek@kernel.org>
cc: Christian Brauner <brauner@kernel.org>
cc: Jeff Layton <jlayton@kernel.org>
cc: netfs@lists.linux.dev
cc: linux-fsdevel@vger.kernel.org
Signed-off-by: Christian Brauner <brauner@kernel.org>