usb: xhci: clean up 'wValue' handling in xhci_hub_control()

usb: xhci: clean up 'wValue' handling in xhci_hub_control()

Several hub control requests encode a descriptor type in the upper byte
of 'wValue'. Clean this up by extracting the descriptor type into a local
variable and using it for all relevant requests.

Replace magic value (0x02) with the appropriate macro (HUB_EXT_PORT_STATUS)

This improves readability and makes the handling of 'wValue' consistent.

Signed-off-by: Niklas Neronin <niklas.neronin@linux.intel.com>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Link: https://patch.msgid.link/20260402131342.2628648-17-mathias.nyman@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>