This was added by:
Commit 8128c4f36 ("ARM: dts: vf610-twr: Add simple-card support.")

This useless property may cause some confusions for users.

Signed-off-by: Xiubo Li <redacted>
---
 arch/arm/boot/dts/vf610-twr.dts | 1 -
 1 file changed, 1 deletion(-)

diff --git a/arch/arm/boot/dts/vf610-twr.dts b/arch/arm/boot/dts/vf610-twr.dts
index 58e988e..82d16ac 100644
--- a/arch/arm/boot/dts/vf610-twr.dts
+++ b/arch/arm/boot/dts/vf610-twr.dts

@@ -76,7 +76,6 @@
 
 		simple-audio-card,cpu {
 			sound-dai = <&sai2>;
-			master-clkdir-out;
 			frame-master;
 			bitclock-master;
 		};

-- 
1.8.5