arm64: zynqmp: Comment all smmu entries

SMMU is disabled by default and not all masters can be enabled at the same
time because of limited number of entries. That's why comment all iommu
properties but keep them for reference in DT. In XEN case they should be
added back and Xen should have SMMU enabled by default.
Also add IDs for DP and DPDMA.

Signed-off-by: Michal Simek <michal.simek@amd.com>
Link: https://lore.kernel.org/r/e868c27c52ded5d8ef25f75ba394b1ab3b31b80a.1698825657.git.michal.simek@amd.com