rockchip: dts: rk3399-puma: disable 'fifo-mode' in sdmmc

Signed-off-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
Acked-by: Simon Glass <sjg@chromium.org>

arch/arm/dts/rk3399-puma.dts

@@ -91,7 +91,6 @@
 &sdmmc {
         u-boot,dm-pre-reloc;
 	bus-width = <4>;
-	fifo-mode; /* until we fix DMA in SPL */
 	status = "okay";
 };