ARM: tegra: paz00: add support serial port on JP1

UART-A is connected to JP1 and used by the bootloader for debugging
output while UART-D is connected to the mini-pcie expansion slot.

Signed-off-by: Marc Dietrich <marvin24@gmx.de>
Signed-off-by: Olof Johansson <olof@lixom.net>