dt-bindings: iommu: renesas,ipmmu-vmsa: add r8a779g0 support

Document the compatible values for the IPMMU-VMSA blocks in
the Renesas R-Car V4H (R8A779G0) SoC.

Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Link: https://lore.kernel.org/r/20230119131833.1008752-1-yoshihiro.shimoda.uh@renesas.com


Signed-off-by: Joerg Roedel <jroedel@suse.de>