dmaengine: idxd: deprecate token sysfs attributes for read buffers

mainline inclusion
from mainline-v5.17
commit fde212e4
category: feature
bugzilla: https://gitee.com/openeuler/intel-kernel/issues/I596WO


CVE: NA

Intel-SIG: commit fde212e4 dmaengine: idxd: deprecate token sysfs attributes for read buffers.
Incremental backporting patches for DSA/IAA on Intel Xeon platform.

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

The following sysfs attributes will be obsolete due to the name change of
tokens to read buffers:
max_tokens
token_limit
group/tokens_allowed
group/tokens_reserved
group/use_token_limit

Create new entries and have old entry print warning of deprecation.

New attributes to replace the token ones:
max_read_buffers
read_buffer_limit
group/read_buffers_allowed
group/read_buffers_reserved
group/use_read_buffer_limit

Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/163951339488.2988321.2424012059911316373.stgit@djiang5-desk3.ch.intel.com


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