ARM: tegra: remove "0, " from DT unit addresses

Apparently the unit address in a DT node name is now supposed to be a
single integer value, rather than a comma-separated list of individual
cell values. Fix the U-Boot DTs to comply with this naming convention.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Tom Warren <twarren@nvidia.com>