ppc4xx: Update Kilauea CPLD configuration with USB PHY reset bit

Now that bit 29 is the USB PHY reset bit, update the Kilauea port
to remove the USB PHY reset after powerup. The CPLD will keep the
USB PHY in reset (active low) until the bit is set to 1 in
board_early_init_f().

Signed-off-by: Stefan Roese <sr@denx.de>