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>
                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>;
 
                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>;
 
                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>;
 
                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>;