hw/arm/xilinx_zynqmp: enable the UHS-I mode

see the Xilinx datasheet "UG1085" (v1.7)
Signed-off-by: NPhilippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: NAlistair Francis <alistair.francis@xilinx.com>
Message-Id: <20180208164818.7961-28-f4bug@amsat.org>

hw/arm/xlnx-zynqmp.c

@@ -400,6 +400,7 @@ static void xlnx_zynqmp_realize(DeviceState *dev, Error **errp)
          */
         object_property_set_uint(sdhci, 3, "sd-spec-version", &err);
         object_property_set_uint(sdhci, SDHCI_CAPABILITIES, "capareg", &err);
+        object_property_set_uint(sdhci, UHS_I, "uhs", &err);
         object_property_set_bool(sdhci, true, "realized", &err);
         if (err) {
             error_propagate(errp, err);