cxl: downgrade a warning message to debug level in cxl_probe_component_regs()

cxl: downgrade a warning message to debug level in cxl_probe_component_regs()

In cxl_probe_component_regs() the error message "Couldn't locate the
CXL.cache and CXL.mem capability array header." is potentially a false
positive error condition.

Downgrade the message from error level to debug level by using dev_dbg()
to print the message, and the end users won't worry about the message
anymore.

[djbw/iweiny: Fix up changelog]

Reported-by: Kelvin Shieh <kshieh@lenovo.com>
Signed-off-by: Coly Li <colyli@suse.de>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Jonathan Cameron <Jonathan.Cameron@Huawei.com>
Cc: Alison Schofield <alison.schofield@intel.com>
Reviewed-by: Dan Williams <dan.j.williams@intel.com>
Link: https://patch.msgid.link/20241021050443.318712-1-colyli@suse.de
Signed-off-by: Ira Weiny <ira.weiny@intel.com>
Signed-off-by: Dave Jiang <dave.jiang@intel.com>