ARM: dts: stm32: Fix qspi pinctrl phandle for stm32mp157c-emstamp-argon

Chip select pinctrl phandle was missing in several stm32mp15x based boards.

Fixes: ea99a5a0 ("ARM: dts: stm32: Create separate pinmux for qspi cs pin in stm32mp15-pinctrl.dtsi")
Signed-off-by: Patrice Chotard <patrice.chotard@foss.st.com>
Cc: Reinhold Mueller <reinhold.mueller@emtrion.com>
Cc: Alexandre Torgue <alexandre.torgue@st.com>
Cc: linux-stm32@st-md-mailman.stormreply.com
Cc: linux-arm-kernel@lists.infradead.org
Signed-off-by: Alexandre Torgue <alexandre.torgue@foss.st.com>

arch/arm/boot/dts/stm32mp157c-emstamp-argon.dtsi

@@ -391,8 +391,12 @@ &pwr_regulators {
 
 &qspi {
 	pinctrl-names = "default", "sleep";
-	pinctrl-0 = <&qspi_clk_pins_a &qspi_bk1_pins_a>;
-	pinctrl-1 = <&qspi_clk_sleep_pins_a &qspi_bk1_sleep_pins_a>;
+	pinctrl-0 = <&qspi_clk_pins_a
+		     &qspi_bk1_pins_a
+		     &qspi_cs1_pins_a>;
+	pinctrl-1 = <&qspi_clk_sleep_pins_a
+		     &qspi_bk1_sleep_pins_a
+		     &qspi_cs1_sleep_pins_a>;
 	reg = <0x58003000 0x1000>, <0x70000000 0x4000000>;
 	#address-cells = <1>;
 	#size-cells = <0>;