ARM: tegra: paz00: fix wrong UART port on mini-pcie plug

UARTC is connected to the mini-pcie port.

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