xhci: xhci-hub: use new port structures for cas and wake mask functions.

Use port structures instead of mmio port arrays for
xhci_port_missing_cas_quirk() and xhci_set_remote_wake_mask() in
xhci-hub.c

Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>