clk: renesas: Make PLL configurations per-SoC

Not all SoCs have the same PLL configuration options,
so make those PLL configuraion tables per-SoC.

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
diff --git a/drivers/clk/renesas/renesas-cpg-mssr.h b/drivers/clk/renesas/renesas-cpg-mssr.h
index 2303baa..eee8b8f 100644
--- a/drivers/clk/renesas/renesas-cpg-mssr.h
+++ b/drivers/clk/renesas/renesas-cpg-mssr.h
@@ -26,6 +26,7 @@
 	unsigned int			mod_clk_base;
 	unsigned int			clk_extal_id;
 	unsigned int			clk_extalr_id;
+	const void			*(*get_pll_config)(const u32 cpg_mode);
 };
 
 struct gen3_clk_priv {