V2:
The KD-20 also has USB 3.0.I modiy the set_irq_affinity usb 2 to set_irq_affinity ?hci_hcd 2 to bind usb 2.0&3.0 to cpu1.

Signed-off-by: Shonn Lu <countrysideboy@qq.com>

SVN-Revision: 47618