LU-17680 ldlm: fix ldlm_res_hop_hash() argument

LU-17680 ldlm: fix ldlm_res_hop_hash() argument

Change ldlm_res_hop_hash() to use "bits" instead of "mask" as the
last argument.  Otherwise, this is hashing all of the LDLM resources
down to very few buckets (e.g. "hash & 8" or "hash & 11") instead of
the full bit range (e.g. "hash & ((1 << 8) - 1)".

This is causing significant slowdowns for file creation performance,
in particular sanity test_123ac was running 2x slower when creating
a large number of files because of the bad hashing.

Fixes: ce404bd07c ("LU-17174 misc: fix hash functions")
Signed-off-by: Andreas Dilger <adilger@whamcloud.com>
Change-Id: I823b370bdb7fac4e673d1b479204dd1216931fb6
Reviewed-on: https://review.whamcloud.com/c/fs/lustre-release/+/54585
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Alex Zhuravlev <bzzz@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>
Reviewed-by: James Simmons <jsimmons@infradead.org>
Reviewed-by: Alexey Lyashkov <alexey.lyashkov@hpe.com>