iommu/ipmmu-vmsa: Add support for r8a779a0

Add support for r8a779a0 (R-Car V3U). The IPMMU hardware design
of this SoC differs than others. So, add a new ipmmu_features for it.

Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/20210907083020.907648-3-yoshihiro.shimoda.uh@renesas.com


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