[][kernel][mt7981][emmc][Fix the code format]

[Description]
Fix rootwait location, put it on the same line as "root".

[Release-log]
N/A

Change-Id: I4b099454b3d5ea1b45b252b81bf0f120787fbec9
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/7251932
diff --git a/target/linux/mediatek/files-5.4/arch/arm64/boot/dts/mediatek/mt7981-sd-rfb.dts b/target/linux/mediatek/files-5.4/arch/arm64/boot/dts/mediatek/mt7981-sd-rfb.dts
index 0c8620b..c181aba 100644
--- a/target/linux/mediatek/files-5.4/arch/arm64/boot/dts/mediatek/mt7981-sd-rfb.dts
+++ b/target/linux/mediatek/files-5.4/arch/arm64/boot/dts/mediatek/mt7981-sd-rfb.dts
@@ -6,8 +6,7 @@
 	chosen {
 		bootargs = "console=ttyS0,115200n1 loglevel=8  \
 				earlycon=uart8250,mmio32,0x11002000 \
-				root=PARTLABEL=rootfs rootwait \
-				rootfstype=squashfs,f2fs";
+				root=PARTLABEL=rootfs rootwait rootfstype=squashfs,f2fs";
 	};
 
 	memory {