ARM: tegra: Rename pcie-controller to pcie

ARM: tegra: Rename pcie-controller to pcie

Recent versions of DTC have checks for PCI host bridge device tree nodes
that are named something other than "pci" or "pcie". Fix all occurrences
of such nodes for Tegra boards to avoid potential warnings from DTC.

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