ramips: fix serial baudrate for final version of ZBT-WG2626 board

The bootloader was updated and now uses 115200 instead of 57600 baud
for the serial console. Change this also in OpenWrt's DTS, so the rate
is consistent for bootloader and linux kernel output.

Signed-off-by: Daniel Golle <daniel@makrotopia.org>

SVN-Revision: 48359

target/linux/ramips/dts/ZBT-WG2626.dts

@@ -12,7 +12,7 @@
 	};
 
 	chosen {
-		bootargs = "console=ttyS0,57600";
+		bootargs = "console=ttyS0,115200";
 	};
 
 	sdhci@10130000 {