LU-10964 build: armv7 client build fixes

This commit is supposed to fix armv7 Lustre client
build, mostly 64-bit division related changes.

Change-Id: I93d83d577351c1a1053e39a162cb1e85fc4e8aa3
Signed-off-by: Andrew Perepechko <c17827@cray.com>
Reviewed-on: https://review.whamcloud.com/32194


Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: James Simmons <uja.ornl@yahoo.com>
Reviewed-by: Alexander Zarochentsev <c17826@cray.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>