usb: core: Add 0x prefix to quirks debug output

Use "0x%x" format for quirks debug print to clarify it's a hexadecimal
value. Improves readability and consistency with other hex outputs.

Signed-off-by: Jiayi Li <lijiayi@kylinos.cn>
Link: https://lore.kernel.org/r/20250603071045.3243699-1-lijiayi@kylinos.cn


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