clk: renesas: rzv2h: Add instance field to struct pll

Add a two-bit "instance" member to struct pll and extend the PLL_PACK()
macro to accept an instance parameter.  Initialize all existing PLL
definitions with instance 0 to preserve legacy behavior. This change
enables support for SoCs with multiple PLL instances (for example,
RZ/G3E we have two PLL DSIs).

Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://patch.msgid.link/20251015192611.241920-2-prabhakar.mahadev-lad.rj@bp.renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>

Author: prabhakarlad

drivers/clk/renesas/rzv2h-cpg.h

@@ -16,20 +16,23 @@
  *
  * @offset: STBY register offset
  * @has_clkn: Flag to indicate if CLK1/2 are accessible or not
+ * @instance: PLL instance number
  */
 struct pll {
 	unsigned int offset:9;
 	unsigned int has_clkn:1;
+	unsigned int instance:2;
 };
 
-#define PLL_PACK(_offset, _has_clkn) \
+#define PLL_PACK(_offset, _has_clkn, _instance) \
 	((struct pll){ \
 		.offset = _offset, \
-		.has_clkn = _has_clkn \
+		.has_clkn = _has_clkn, \
+		.instance = _instance \
 	})
 
-#define PLLCA55		PLL_PACK(0x60, 1)
-#define PLLGPU		PLL_PACK(0x120, 1)
+#define PLLCA55		PLL_PACK(0x60, 1, 0)
+#define PLLGPU		PLL_PACK(0x120, 1, 0)
 
 /**
  * struct ddiv - Structure for dynamic switching divider