add gpio led uart

hc

2024-05-10 748e4f3d702def1a4bff191e0cf93b6a05340f01

 kernel/arch/arm/boot/dts/bcm23550-sparrow.dts
..
..
@@ -45,7 +45,8 @@
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 		bootargs = "console=ttyS0,115200n8";
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 	};
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-	memory {
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+	memory@80000000 {
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+		device_type = "memory";
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 		reg = <0x80000000 0x20000000>; /* 512 MB */
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 	};
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 };