usb: misc: onboard_usb_hub: Print symbolic error names

Instead of printing the decimal error codes, let's use the more
human-readable symbolic error names provided by the %pe printk
format specifier.

Signed-off-by: Frieder Schrempf <frieder.schrempf@kontron.de>
Link: https://lore.kernel.org/r/20231127112234.109073-1-frieder@fris.de


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>