spi: renesas,sh-msiof: Miscellaneous improvements

Make "clocks" and "power-domains" required everywhere.
Make "resets" required on R-Car Gen2 and newer (i.e. all but SH-Mobile).

Update the example to match reality:
- Use interrupt binding definitions instead of hardcoded numbers,
- Convert to new-style CPG/MSSR bindings,
- Add missing "power-domains" and "resets" properties.

Signed-off-by: Geert Uytterhoeven <[e-mail]>
Link: https://lore.kernel.org/r/052af[e-mail]
Signed-off-by: Mark Brown <[e-mail]>

Documentation/devicetree/bindings/spi/renesas,sh-msiof.yaml

···
   - compatible
   - reg
   - interrupts
+  - clocks
+  - power-domains
   - '#address-cells'
   - '#size-cells'
+
+if:
+  not:
+    properties:
+      compatible:
+        contains:
+          const: renesas,sh-mobile-msiof
+then:
+  required:
+    - resets
 
 unevaluatedProperties: false
 
 examples:
   - |
-    #include <dt-bindings/clock/r8a7791-clock.h>
-    #include <dt-bindings/interrupt-controller/irq.h>
+    #include <dt-bindings/clock/r8a7791-cpg-mssr.h>
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    #include <dt-bindings/power/r8a7791-sysc.h>
 
     msiof0: spi@e6e20000 {
         compatible = "renesas,msiof-r8a7791", "renesas,rcar-gen2-msiof";
         reg = <0xe6e20000 0x0064>;
-        interrupts = <0 156 IRQ_TYPE_LEVEL_HIGH>;
-        clocks = <&mstp0_clks R8A7791_CLK_MSIOF0>;
+        interrupts = <GIC_SPI 156 IRQ_TYPE_LEVEL_HIGH>;
+        clocks = <&cpg CPG_MOD 000>;
         dmas = <&dmac0 0x51>, <&dmac0 0x52>;
         dma-names = "tx", "rx";
+        power-domains = <&sysc R8A7791_PD_ALWAYS_ON>;
+        resets = <&cpg 0>;
         #address-cells = <1>;
         #size-cells = <0>;
     };