arm64: dts: renesas: salvator: set driver type for eMMC

These boards are known to have eMMC issues with the default driver type.
Specify a working one.
Signed-off-by: NWolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: NSimon Horman <horms+renesas@verge.net.au>

arch/arm64/boot/dts/renesas/salvator-common.dtsi

@@ -596,6 +596,7 @@
 	bus-width = <8>;
 	mmc-hs200-1_8v;
 	non-removable;
+	fixed-emmc-driver-type = <1>;
 	status = "okay";
 };