arm64: dts: ns2: Fixed QSPI compatible string

The string was incorrectly defined before from least to most specific,
swap the compatible strings accordingly.

Fixes: ff73917d ("ARM64: dts: Add QSPI Device Tree node for NS2")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>

arch/arm64/boot/dts/broadcom/northstar2/ns2.dtsi

@@ -745,7 +745,7 @@ nand: nand@66460000 {
 		};
 
 		qspi: spi@66470200 {
-			compatible = "brcm,spi-bcm-qspi", "brcm,spi-ns2-qspi";
+			compatible = "brcm,spi-ns2-qspi", "brcm,spi-bcm-qspi";
 			reg = <0x66470200 0x184>,
 				<0x66470000 0x124>,
 				<0x67017408 0x004>,