arm64: zynqmp: Remove address/size-cells from ams node

Remove unused address/size-cells which is also done upstream that's why
this is pretty much sync patch with upstream.

Signed-off-by: Michal Simek <michal.simek@amd.com>
Link: https://lore.kernel.org/r/0ca8d8fe245ad7cb665f5333202d83f70acfc11f.1697115523.git.michal.simek@amd.com