dts: nxp_lpc55S6x_common: revert to flexcomm SS

Disables GPIO CS in order to use Flexcomm's SS as chip select issues
were resolved.

Signed-off-by: Andrei Gansari <[email protected]>

Author: agansari

dts/arm/nxp/nxp_lpc55S6x_common.dtsi

@@ -192,10 +192,12 @@
 
 	hs_lspi: spi@9f000 {
 		compatible = "nxp,lpc-spi";
-		cs-gpios = <&gpio0 20 GPIO_ACTIVE_LOW>,
+		/* Enabling cs-gpios below will allow using GPIO CS,
+		 rather than Flexcomm SS */
+		/* cs-gpios = <&gpio0 20 GPIO_ACTIVE_LOW>,
 			<&gpio1 1 GPIO_ACTIVE_LOW>,
 			<&gpio1 12 GPIO_ACTIVE_LOW>,
-			<&gpio1 26 GPIO_ACTIVE_LOW>;
+			<&gpio1 26 GPIO_ACTIVE_LOW>; */
 		reg = <0x9f000 0x1000>;
 		interrupts = <59 0>;
 		label = "HS_LSPI";