dt-bindings: clock: renesas,rzg2l-cpg: Document RZ/G3L SoC

dt-bindings: clock: renesas,rzg2l-cpg: Document RZ/G3L SoC

Document the device tree bindings for the Renesas RZ/G3L SoC Clock Pulse
Generator (CPG). RZ/G3L CPG is similar to RZ/G2L CPG but has 5 clocks
compared to 1 clock on other SoCs.

Also define RZ/G3L (R9A08G046) Clock Pulse Generator Core Clocks, as
listed in section 4.4.4.1 ("Block Diagram of the Clock System"), module
clock outputs, as listed in section 4.4.2 ("Clock List r1.00") and add
Reset definitions referring to registers CPG_RST_* in Section 4.4.3
("Register") of the RZ/G3L Hardware User's Manual (Rev.1.00 Oct, 2025).

Acked-by: Conor Dooley <conor.dooley@microchip.com>
Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://patch.msgid.link/20260324114329.268249-2-biju.das.jz@bp.renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>