dmaengine: idxd: Remove unused struct idxd_fault

mainline inclusion
from mainline-v6.1
commit d1083fd0
category: feature
bugzilla: https://gitee.com/openeuler/intel-kernel/issues/I596WO


CVE: NA

Intel-SIG: commit d1083fd0 dmaengine: idxd: Remove unused struct idxd_fault.
Incremental backporting patches for DSA/IAA on Intel Xeon platform.

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

Since fault processing code has been removed, struct idxd_fault is not used any
more and can be removed as well.

Signed-off-by: Yuan Can <yuancan@huawei.com>
Link: https://lore.kernel.org/r/20220928014747.106808-1-yuancan@huawei.com


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