arm64: dts: socfpga: drop unsupported cdns,page-size and cdns,block-size

cdns,page-size and cdns,block-size are neither documented nor used by
Linux, so remove them to fix dtbs_check warnings like:

  socfpga_n5x_socdk.dtb: flash@0: Unevaluated properties are not allowed ('cdns,block-size', 'cdns,page-size' were unexpected)
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Dinh Nguyen <dinguyen@kernel.org>

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

@@ -187,8 +187,6 @@ flash@0 {
 		spi-max-frequency = <100000000>;
 
 		m25p,fast-read;
-		cdns,page-size = <256>;
-		cdns,block-size = <16>;
 		cdns,read-delay = <1>;
 		cdns,tshsl-ns = <50>;
 		cdns,tsd2d-ns = <50>;

arch/arm64/boot/dts/altera/socfpga_stratix10_socdk_nand.dts

@@ -176,8 +176,6 @@ flash@0 {
 		spi-max-frequency = <100000000>;
 
 		m25p,fast-read;
-		cdns,page-size = <256>;
-		cdns,block-size = <16>;
 		cdns,read-delay = <1>;
 		cdns,tshsl-ns = <50>;
 		cdns,tsd2d-ns = <50>;

arch/arm64/boot/dts/intel/socfpga_agilex_socdk.dts

@@ -113,8 +113,6 @@ flash@0 {
 		spi-max-frequency = <100000000>;
 
 		m25p,fast-read;
-		cdns,page-size = <256>;
-		cdns,block-size = <16>;
 		cdns,read-delay = <2>;
 		cdns,tshsl-ns = <50>;
 		cdns,tsd2d-ns = <50>;

arch/arm64/boot/dts/intel/socfpga_n5x_socdk.dts

@@ -91,8 +91,6 @@ flash@0 {
 		spi-max-frequency = <100000000>;
 
 		m25p,fast-read;
-		cdns,page-size = <256>;
-		cdns,block-size = <16>;
 		cdns,read-delay = <2>;
 		cdns,tshsl-ns = <50>;
 		cdns,tsd2d-ns = <50>;