Changing the compatible changes the properties allowed -
snps,dw-apb-uart doesn't specify no-loopback-test, so remove it.

Signed-off-by: Andrew Jeffery <andrew@codeconstruct.com.au>
---
 arch/arm/boot/dts/aspeed/aspeed-ast2600-evb.dts | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm/boot/dts/aspeed/aspeed-ast2600-evb.dts b/arch/arm/boot/dts/aspeed/aspeed-ast2600-evb.dts
index c51977dcb56b..3f2ca9da0be2 100644
--- a/arch/arm/boot/dts/aspeed/aspeed-ast2600-evb.dts
+++ b/arch/arm/boot/dts/aspeed/aspeed-ast2600-evb.dts
@@ -205,6 +205,7 @@ flash@0 {
 &uart5 {
 	// Workaround for A0
 	compatible = "snps,dw-apb-uart";
+	/delete-property/ no-loopback-test;
 };
 
 &i2c0 {

-- 
2.47.3