arm64: dts: stratix10: increase QSPI max frequency to 100MHz

The Stratix10 devkit's QSPI can support up to 100MHz.

Cc: Thor Thayer <thor.thayer@linux.intel.com>
Signed-off-by: Dinh Nguyen <dinguyen@kernel.org>

arch/arm64/boot/dts/altera/socfpga_stratix10_socdk.dts

@@ -160,7 +160,7 @@ flash@0 {
 		#size-cells = <1>;
 		compatible = "n25q00a";
 		reg = <0>;
-		spi-max-frequency = <50000000>;
+		spi-max-frequency = <100000000>;
 
 		m25p,fast-read;
 		cdns,page-size = <256>;