ARM: dts: aspeed-g6: Enable more UART controllers

Setup the configuration of UART6, UART7, UART8, and UART9 in
aspeed-g6.dtsi.
Signed-off-by: Ken Chen <j220584470k@gmail.com>
Link: https://lore.kernel.org/r/20220805090957.470434-1-j220584470k@gmail.comSigned-off-by: Joel Stanley <joel@jms.id.au>

arch/arm/boot/dts/aspeed-g6.dtsi

@@ -756,6 +756,62 @@ uart4: serial@1e78f000 {
 				status = "disabled";
 			};
 
+			uart6: serial@1e790000 {
+				compatible = "ns16550a";
+				reg = <0x1e790000 0x20>;
+				reg-shift = <2>;
+				reg-io-width = <4>;
+				interrupts = <GIC_SPI 57 IRQ_TYPE_LEVEL_HIGH>;
+				clocks = <&syscon ASPEED_CLK_GATE_UART6CLK>;
+				no-loopback-test;
+				pinctrl-names = "default";
+				pinctrl-0 = <&pinctrl_uart6_default>;
+
+				status = "disabled";
+			};
+
+			uart7: serial@1e790100 {
+				compatible = "ns16550a";
+				reg = <0x1e790100 0x20>;
+				reg-shift = <2>;
+				reg-io-width = <4>;
+				interrupts = <GIC_SPI 58 IRQ_TYPE_LEVEL_HIGH>;
+				clocks = <&syscon ASPEED_CLK_GATE_UART7CLK>;
+				no-loopback-test;
+				pinctrl-names = "default";
+				pinctrl-0 = <&pinctrl_uart7_default>;
+
+				status = "disabled";
+			};
+
+			uart8: serial@1e790200 {
+				compatible = "ns16550a";
+				reg = <0x1e790200 0x20>;
+				reg-shift = <2>;
+				reg-io-width = <4>;
+				interrupts = <GIC_SPI 59 IRQ_TYPE_LEVEL_HIGH>;
+				clocks = <&syscon ASPEED_CLK_GATE_UART8CLK>;
+				no-loopback-test;
+				pinctrl-names = "default";
+				pinctrl-0 = <&pinctrl_uart8_default>;
+
+				status = "disabled";
+			};
+
+			uart9: serial@1e790300 {
+				compatible = "ns16550a";
+				reg = <0x1e790300 0x20>;
+				reg-shift = <2>;
+				reg-io-width = <4>;
+				interrupts = <GIC_SPI 60 IRQ_TYPE_LEVEL_HIGH>;
+				clocks = <&syscon ASPEED_CLK_GATE_UART9CLK>;
+				no-loopback-test;
+				pinctrl-names = "default";
+				pinctrl-0 = <&pinctrl_uart9_default>;
+
+				status = "disabled";
+			};
+
 			i2c: bus@1e78a000 {
 				compatible = "simple-bus";
 				#address-cells = <1>;