LU-17174 misc: fix hash functions

LU-17174 misc: fix hash functions

1) LU-16518 landing caused a bug which visible with debug kernel

UBSAN: Undefined behaviour in include/linux/hash.h:81:31
shift exponent 64 is too large for 64-bit type
	'long long unsigned int'
Call Trace:
dump_stack+0x8e/0xd0
ubsan_epilogue+0x5/0x21
ldlm_export_lock_hash+0x49/0x4d [ptlrpc]
cfs_hash_bd_from_key+0x88/0x2e0 [libcfs]

2) use a high bits unstead of low as it more accurate.

HPe-bug-id: LUS-11925
Fixes: 239e8268 (LU-16518 misc: use fixed hash code)
Signed-off-by: Alexey Lyashkov <alexey.lyashkov@hpe.com>
Change-Id: Ie1c531ad220f44e55fbf80674a49472fb6024252
Reviewed-on: https://review.whamcloud.com/c/fs/lustre-release/+/52611
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: James Simmons <jsimmons@infradead.org>
Reviewed-by: Oleg Drokin <green@whamcloud.com>
Reviewed-by: Timothy Day <timday@amazon.com>