openwrt/target/linux/ppc44x/patches-3.18/110-openwrt_dts_cmdline.patch

--- a/arch/powerpc/boot/dts/taishan.dts
+++ b/arch/powerpc/boot/dts/taishan.dts
@@ -419,5 +419,6 @@
 
 	chosen {
 		linux,stdout-path = "/plb/opb/serial@40000300";
+		bootargs = "rootfstype=squashfs noinitrd";
 	};
 };