dt-bindings: clock: st: clkgen-pll: add new introduced compatible

New compatible are added, supporting various kind of clkgen-pll
used for STiH407, STiH410 and STiH418

Signed-off-by: Alain Volmat <avolmat@me.com>
Acked-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20210331201632.24530-6-avolmat@me.com
Signed-off-by: Stephen Boyd <sboyd@kernel.org>

Documentation/devicetree/bindings/clock/st/st,clkgen-pll.txt

@@ -10,7 +10,10 @@ Required properties:
 
 - compatible : shall be:
 	"st,clkgen-pll0"
+	"st,clkgen-pll0-a0"
+	"st,clkgen-pll0-c0"
 	"st,clkgen-pll1"
+	"st,clkgen-pll1-c0"
 	"st,stih407-clkgen-plla9"
 	"st,stih418-clkgen-plla9"