arm64: zynqmp: Sync psgtr node location with zcu104-revA

zcu104-revA has node below pinctrl which is not the same on revC. Sync
location for easier comparison.
Also zc1751-dc1 is not using this position.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Link: https://lore.kernel.org/r/4b691bab5ba83b5352d4669bd54bcdb8273b2156.1623684253.git.michal.simek@xilinx.com