cxl/core/regs: Rename phys_addr in cxl_map_component_regs()

Trivial change that renames variable phys_addr in
cxl_map_component_regs() to shorten its length to keep the 80 char
size limit for the line and also for consistency between the different
paths.

Signed-off-by: Terry Bowman <terry.bowman@amd.com>
Signed-off-by: Robert Richter <rrichter@amd.com>
Reviewed-by: Dave Jiang <dave.jiang@intel.com>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Link: https://lore.kernel.org/r/20231018171713.1883517-20-rrichter@amd.com


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