[PATCH v2] dt-bindings: spi: renesas,sh-msiof: Fix 'unevaluatedProperties' warnings

[Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>]

With 'unevaluatedProperties' support implemented, there's a number of
warnings when running dtbs_check:

arch/arm64/boot/dts/renesas/r8a77951-ulcb-kf.dtb: spi@e6e90000: Unevaluated properties are not allowed ('power-domains', 'resets' were unexpected)
	From schema: Documentation/devicetree/bindings/spi/renesas,sh-msiof.yaml

The main problem is that SoC DTSI's include power-domains and resets
property, whereas the renesas,sh-msiof.yaml has 'unevaluatedProperties:
false'. So just add optional power-domains and resets properties.

Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
---
v1->v2
* Set maxItems to 1

v1: https://lore.kernel.org/lkml/cae2f59a-aeeb-e573-029f-7151ae29dd28@linaro.org/T/
---
 Documentation/devicetree/bindings/spi/renesas,sh-msiof.yaml | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/Documentation/devicetree/bindings/spi/renesas,sh-msiof.yaml b/Documentation/devicetree/bindings/spi/renesas,sh-msiof.yaml
index 5de710adfa63..78c958b22f32 100644
--- a/Documentation/devicetree/bindings/spi/renesas,sh-msiof.yaml
+++ b/Documentation/devicetree/bindings/spi/renesas,sh-msiof.yaml
@@ -69,6 +69,12 @@ properties:
   clocks:
     maxItems: 1
 
+  power-domains:
+    maxItems: 1
+
+  resets:
+    maxItems: 1
+
   num-cs:
     description: |
       Total number of chip selects (default is 1).
-- 
2.25.1