usb: host: xhci: using correct specification chapter reference for DCBAAP

Using correct specification chapter reference for DCBAAP
(Device Context Base Address Array Pointer).

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