dt-bindings: net: renesas,rzv2h-gbeth: Document Renesas RZ/G3L RMII{tx,rx} clocks

As per the RZ/G3L Hardware manual, CPG_CLKON_ETH register bits{12,13} are
to control the RMII{tx, rx} clocks. Document the rmii{tx.rx} clocks for
RZ/G3L SoC.

Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://patch.msgid.link/20260203104541.264759-1-biju.das.jz@bp.renesas.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Documentation/devicetree/bindings/net/renesas,rzv2h-gbeth.yaml

@@ -58,6 +58,8 @@ properties:
           - description: TX clock phase-shifted by 180 degrees
           - description: RX clock phase-shifted by 180 degrees
           - description: RMII clock
+          - description: RMII TX clock
+          - description: RMII RX clock
 
         minItems: 7
 
@@ -77,6 +79,8 @@ properties:
           - const: tx-180
           - const: rx-180
           - const: rmii
+          - const: rmii_tx
+          - const: rmii_rx
 
         minItems: 7
 
@@ -170,10 +174,10 @@ allOf:
     then:
       properties:
         clocks:
-          minItems: 8
+          minItems: 10
 
         clock-names:
-          minItems: 8
+          minItems: 10
 
         interrupts:
           minItems: 15