cxl: fix cxl_report_and_clear() RAS UE addr mis-assignment

'addr' that contains RAS UE register address is re-assigned to
RAS_CAP_CONTROL offset if there are multiple UE errors. Use different addr
variable to avoid the reassignment mistake.

Fixes: 2905cb52

 ("cxl/pci: Add (hopeful) error handling support")
Reported-by: Jonathan Cameron <jonathan.cameron@huawei.com>
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Link: https://lore.kernel.org/r/167302318779.580155.15233596744650706167.stgit@djiang5-mobl3.local
Signed-off-by: Dan Williams <dan.j.williams@intel.com>