arm64: dts: socfpga: stratix10_swvp: drop unsupported DW MSHC properties

altr,dw-mshc-ciu-div and altr,dw-mshc-sdr-timing are neither documented
nor used by Linux, so remove them to fix dtbs_check warnings like:

  socfpga_stratix10_swvp.dtb: mmc@ff808000: Unevaluated properties are not allowed
    ('altr,dw-mshc-ciu-div', 'altr,dw-mshc-sdr-timing' 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_swvp.dts

@@ -80,8 +80,6 @@ &gmac2 {
 
 &mmc {
 	status = "okay";
-	altr,dw-mshc-ciu-div = <0x3>;
-	altr,dw-mshc-sdr-timing = <0x0 0x3>;
 	cap-sd-highspeed;
 	cap-mmc-highspeed;
 	broken-cd;