dmaengine: idxd: define table offset multiplier

mainline inclusion
from mainline-v5.11
commit 2f8417a9
category: feature
bugzilla: https://gitee.com/openeuler/intel-kernel/issues/I596WO


CVE: NA

Intel-SIG: commit 2f8417a9 dmaengine: idxd: define table offset multiplier.
Incremental backporting patches for DSA/IAA on Intel Xeon platform.

--------------------------------

Convert table offset multiplier magic number to a define.

Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/160407311690.839435.6941865731867828234.stgit@djiang5-desk3.ch.intel.com


Signed-off-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Xiaochen Shen <xiaochen.shen@intel.com>