pinctrl: pinctrl_stm32: Add stm32mp2 support

Add stm32mp2 compatible.

Signed-off-by: Patrice Chotard <patrice.chotard@foss.st.com>
Reviewed-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
diff --git a/drivers/pinctrl/pinctrl_stm32.c b/drivers/pinctrl/pinctrl_stm32.c
index 8bb7588..7120b8e 100644
--- a/drivers/pinctrl/pinctrl_stm32.c
+++ b/drivers/pinctrl/pinctrl_stm32.c
@@ -505,6 +505,8 @@
 	{ .compatible = "st,stm32mp157-pinctrl" },
 	{ .compatible = "st,stm32mp157-z-pinctrl" },
 	{ .compatible = "st,stm32mp135-pinctrl" },
+	{ .compatible = "st,stm32mp257-pinctrl" },
+	{ .compatible = "st,stm32mp257-z-pinctrl" },
 	{ }
 };