arm64: tegra: Bump #address-cells and #size-cells

The #address-cells and #size-cells properties for the top-level bus were
set to 1 because that was enough to represent the register ranges of all
the IP blocks on that bus. However, most of these devices can do DMA to
a larger address space, so translation of DMA addresses needs to happen
in a 64-bit address space.

Partially this was already done by the memory controller increasing that
address space by setting #address-cells and #size-cells to 2, but a full
DMA address translation would still cause truncation when traversing to
the top-level bus.

Fix this by setting #address-cells = <2> and #size-cells = <2> on the
top-level bus and adjusting all "reg" and "ranges" properties of its
children.

While at it, also move the PCI and GPU nodes back under the top-level
bus where they belong. The were put outside of it to work around this
same problem.

Signed-off-by: Thierry Reding <treding@nvidia.com>