add gpio led uart

hc

2024-05-10 748e4f3d702def1a4bff191e0cf93b6a05340f01

 kernel/Documentation/devicetree/bindings/gpio/gpio-aspeed.txt
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 Required properties:
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-- compatible		: Either "aspeed,ast2400-gpio" or "aspeed,ast2500-gpio"
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+- compatible		: Either "aspeed,ast2400-gpio", "aspeed,ast2500-gpio",
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+					or "aspeed,ast2600-gpio".
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 - #gpio-cells 		: Should be two
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 			  - First cell is the GPIO line number
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 Optional properties:
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-- clocks                : A phandle to the clock to use for debounce timings
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+- clocks		: A phandle to the clock to use for debounce timings
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+- ngpios		: Number of GPIOs controlled by this controller. Should	be set
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+				  when there are multiple GPIO controllers on a SoC (ast2600).
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 The gpio and interrupt properties are further described in their respective
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 bindings documentation: