[source] ramips: add missing i2s alias

[LEDE Commits]

blogic pushed a commit to source.git, branch master:
https://git.lede-project.org/?p=source.git;a=commitdiff;h=6674006bd005118e67b750d6f9f85d1e2b1a0208

commit 6674006bd005118e67b750d6f9f85d1e2b1a0208
Author: John Crispin <john at phrozen.org>
AuthorDate: Thu Jul 21 23:34:25 2016 +0200

    ramips: add missing i2s alias
    
    Signed-off-by: John Crispin <john at phrozen.org>
---
 target/linux/ramips/dts/rt5350.dtsi | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/target/linux/ramips/dts/rt5350.dtsi b/target/linux/ramips/dts/rt5350.dtsi
index 99959bf..5310ce8 100644
--- a/target/linux/ramips/dts/rt5350.dtsi
+++ b/target/linux/ramips/dts/rt5350.dtsi
@@ -153,7 +153,7 @@
 			status = "disabled";
 		};
 
-		i2s at a00 {
+		i2s: i2s at a00 {
 			compatible = "ralink,rt3352-i2s";
 			reg = <0xa00 0x100>;