cxl/edac: Add support for PERFORM_MAINTENANCE command

cxl/edac: Add support for PERFORM_MAINTENANCE command

Add support for PERFORM_MAINTENANCE command.

CXL spec 3.2 section 8.2.10.7.1 describes the Perform Maintenance command.
This command requests the device to execute the maintenance operation
specified by the maintenance operation class and the maintenance operation
subclass.

Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Dave Jiang <dave.jiang@intel.com>
Signed-off-by: Shiju Jose <shiju.jose@huawei.com>
Reviewed-by: Alison Schofield <alison.schofield@intel.com>
Acked-by: Dan Williams <dan.j.williams@intel.com>
Link: https://patch.msgid.link/20250521124749.817-6-shiju.jose@huawei.com
Signed-off-by: Dave Jiang <dave.jiang@intel.com>