staging: octeon-usb: CN3xxx: program p_xenbn and p_rclk through p_rtype

Do the clock setup through p_rtype on all OCTEONs. This enables to get
rid of duplicated register definitions.

Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>