iommu/ipmmu-vmsa: Add Renesas R8A779F0 (R-Car S4) support

iommu/ipmmu-vmsa: Add Renesas R8A779F0 (R-Car S4) support

Based on the following Linux upsteam commit:
7a62ced8ebd0e1b692c9dc4781a8d4ddb0f74792

Original commit message:
 commit 7a62ced8ebd0e1b692c9dc4781a8d4ddb0f74792
 Author: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
 Date:   Tue Sep 7 17:30:20 2021 +0900

  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>
**********

The R-Car S4 is an automotive System-on-Chip (SoC) for Car
Server/Communication Gateway and is one of the first products
in Renesas’ 4th-generation R-Car Family.

The integrated IOMMU HW is also VMSA-compatible and supports
stage 2 translation table format, therefore can be used with
current driver with slight modifications (thanks to the prereq
work).

In the context of Xen driver the main differences between Gen3
and Gen4 are the following:
- HW capacity was enlarged to support up to 16 IPMMU contexts
  (sets of page table) and up to 64 micro-TLBs per IPMMU device
- the memory mapped registers have different bases and offsets

Please note that Linux upstream doesn't support R-Car S4 SoC
yet unlike Renesas BSP [1], but it was decided to reuse upstream
patch for R-Car V3U anyway as the IPMMU HW settings are similar.

[1]
7003b9f732cf iommu/ipmmu-vmsa: Add Renesas R8A779F0 (R-Car S4) support
https://github.com/renesas-rcar/linux-bsp/tree/v5.10.41/rcar-5.1.3.rc5

Signed-off-by: Oleksandr Tyshchenko <oleksandr_tyshchenko@epam.com>
Signed-off-by: Oleksandr Andrushchenko <oleksandr_andrushchenko@epam.com>
Reviewed-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Acked-by: Julien Grall <jgrall@amazon.com>