ARM: dts: aspeed: wedge400: Set eMMC max frequency

Set eMMC max frequency to 25MHz to prevent intermittent eMMC access
failures.
Signed-off-by: Tao Ren <rentao.bupt@gmail.com>
Reviewed-by: Joel Stanley <joel@jms.id.au>
Link: https://lore.kernel.org/r/20230803230324.731268-4-rentao.bupt@gmail.comSigned-off-by: Joel Stanley <joel@jms.id.au>

arch/arm/boot/dts/aspeed/aspeed-bmc-facebook-wedge400.dts

@@ -367,6 +367,7 @@ &uhci {
 };
 
 &sdhci1 {
+	max-frequency = <25000000>;
 	/*
 	 * DMA mode needs to be disabled to avoid conflicts with UHCI
 	 * Controller in AST2500 SoC.