ARM: dts: STiH410-b2260: Fix typo in spi0 chipselect definition

Change cs-gpio to cs-gpios.
Signed-off-by: Loic Pallardy <loic.pallardy@st.com>
Acked-by: Patrice Chotard <patrice.chotard@st.com>

arch/arm/boot/dts/stih410-b2260.dts

@@ -74,7 +74,7 @@ uart1: serial@9831000 {
 		/* Low speed expansion connector */
 		spi0: spi@9844000 {
 			label = "LS-SPI0";
-			cs-gpio = <&pio30 3 0>;
+			cs-gpios = <&pio30 3 0>;
 			status = "okay";
 		};