fix(stm32mp13-fdts): align sdmmc pins with kernel

Update the pinctrl nodes for sdmmc instances in stm32mp13-pinctrl.dtsi
file to align with Linux. The boards DT files then need to be updated
accordingly.

Signed-off-by: Yann Gautier <yann.gautier@foss.st.com>
Change-Id: I4e1f3cf78794bfb7bbe53cfc7e88623c7e79855d
diff --git a/fdts/stm32mp135f-dk.dts b/fdts/stm32mp135f-dk.dts
index 6240381..e58be40 100644
--- a/fdts/stm32mp135f-dk.dts
+++ b/fdts/stm32mp135f-dk.dts
@@ -303,7 +303,7 @@
 
 &sdmmc1 {
 	pinctrl-names = "default";
-	pinctrl-0 = <&sdmmc1_b4_pins_a>;
+	pinctrl-0 = <&sdmmc1_b4_pins_a &sdmmc1_clk_pins_a>;
 	disable-wp;
 	st,neg-edge;
 	bus-width = <4>;