dt-bindings: clock: renesas,rzg2l: Simplify header file references

The bindings already uses <dt-bindings/clock/r9a0*-cpg.h> to refer to
the header files with DT binding definitions for core clocks.
Use more wildcards to simplify more references to these files.

Signed-off-by: Geert Uytterhoeven <[e-mail]>
Acked-by: Rob Herring <[e-mail]>
Link: https://lore.kernel.org/r/f274a[e-mail]

Documentation/devicetree/bindings/clock/renesas,rzg2l-cpg.yaml

···
     description: |
       - For CPG core clocks, the two clock specifier cells must be "CPG_CORE"
         and a core clock reference, as defined in
-        <dt-bindings/clock/r9a0*-cpg.h>
+        <dt-bindings/clock/r9a0*-cpg.h>,
       - For module clocks, the two clock specifier cells must be "CPG_MOD" and
-        a module number, as defined in the <dt-bindings/clock/r9a07g0*-cpg.h> or
-        <dt-bindings/clock/r9a09g011-cpg.h>.
+        a module number, as defined in <dt-bindings/clock/r9a0*-cpg.h>.
     const: 2
 
   '#power-domain-cells':
···
   '#reset-cells':
     description:
       The single reset specifier cell must be the module number, as defined in
-      the <dt-bindings/clock/r9a07g0*-cpg.h> or <dt-bindings/clock/r9a09g011-cpg.h>.
+      <dt-bindings/clock/r9a0*-cpg.h>.
     const: 1
 
 required: