arm64: dts: renesas: salvator-x: exio-d: Add overlay for SCIF3

Provide access to SCIF3 on EXIO Connector D.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
---
v8:
  - Convert to SPDX-License-Identifier,

v7:
  - Remove unneeded #include <dt-bindings/clock/r8a7795-cpg-mssr.h>,
  - Remove serial alias, now the sh-sci driver supports dynamic IDs,
  - Convert to sugar syntax,

v6:
  - Unify for all Salvator-X(S),

v5:
  - Split /dts-v1/ and /plugin/, as required by dtc grammar cleanup,

v4:
  - Include "r8a7795" in one line summary,

v3:
  - Rename overlay to include the connector name,
  - Split overlay for SCIF3/HSCIF3 loop testing in separate overlays for
    SCIF3 and HSCIF3,
  - Use "fragment-foo" instead of "fragment@n",

v2:
  - Use generic pinctrl properties.
1 file changed