ARM: tegra: paz00: add clocks required for usb operation

These clocks are required for usb operation. pll_p_out4 needs to be set
to 24 MHz. The other clocks default to "off" in order to save some energy.

Signed-off-by: Marc Dietrich <marvin24@gmx.de>
Acked-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Olof Johansson <olof@lixom.net>