usb: core: modify comments xhci_hc_driver has HCD_MEMORY just like ehci ohci

xhci_hc_driver has HCD_MEMORY attributes,need to modify the comment

Signed-off-by: Xu Rao <raoxu@uniontech.com>
Link: https://lore.kernel.org/r/20250529092314.135457-1-raoxu@uniontech.com


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