dt-bindings: clock: renesas,r9a09g077: Add PCLKL core clock ID

Add the Peripheral Module Clock L (PCLKL) core clock ID for the RZ/T2H
(R9A09G077) SoC.  This clock is used by peripherals such as IIC, WDT,
and others.

Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/20250617155757.149597-3-prabhakar.mahadev-lad.rj@bp.renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>

Author: prabhakarlad

include/dt-bindings/clock/renesas,r9a09g077-cpg-mssr.h

@@ -23,5 +23,6 @@
 #define R9A09G077_CLK_PCLKGPTL		11
 #define R9A09G077_CLK_PCLKH		12
 #define R9A09G077_CLK_PCLKM		13
+#define R9A09G077_CLK_PCLKL		14
 
 #endif /* __DT_BINDINGS_CLOCK_RENESAS_R9A09G077_CPG_H__ */