cxl: Remove unnecessary type cast in cxl_qos_class_verify()

The passed in host bridge parameter for device_for_each_child() has
unnecessary void * type cast. Remove the type cast.

Suggested-by: Jonathan Cameron <Jonathan.Cameron@Huawei.com>
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/20240206190431.1810289-3-dave.jiang@intel.com


Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>