CXL dports are added in a couple of code paths using
devm_cxl_add_dport(). Debug messages are individually generated, but
are incomplete and inconsistent. Change this by moving its generation
to devm_cxl_add_dport(). This unifies the messages and reduces code
duplication. Also, generate messages on failure.
Signed-off-by: Robert Richter <rrichter@xxxxxxx>