serial: 8250_ingenic: Add support for the JZ4770 SoC

The JZ4770 SoC's UART is no different from the other JZ SoCs, so this
commit simply adds the ingenic,jz4770-uart compatible string.
Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Documentation/devicetree/bindings/serial/ingenic,uart.txt

 * Ingenic SoC UART
 
 Required properties:
-- compatible : "ingenic,jz4740-uart", "ingenic,jz4760-uart",
-	"ingenic,jz4775-uart" or "ingenic,jz4780-uart"
+- compatible : One of:
+  - "ingenic,jz4740-uart",
+  - "ingenic,jz4760-uart",
+  - "ingenic,jz4770-uart",
+  - "ingenic,jz4775-uart",
+  - "ingenic,jz4780-uart".
 - reg : offset and length of the register set for the device.
 - interrupts : should contain uart interrupt.
 - clocks : phandles to the module & baud clocks.

drivers/tty/serial/8250/8250_ingenic.c

@@ -125,6 +125,10 @@ EARLYCON_DECLARE(jz4740_uart, ingenic_early_console_setup);
 OF_EARLYCON_DECLARE(jz4740_uart, "ingenic,jz4740-uart",
 		    ingenic_early_console_setup);
 
+EARLYCON_DECLARE(jz4770_uart, ingenic_early_console_setup);
+OF_EARLYCON_DECLARE(jz4770_uart, "ingenic,jz4770-uart",
+		    ingenic_early_console_setup);
+
 EARLYCON_DECLARE(jz4775_uart, ingenic_early_console_setup);
 OF_EARLYCON_DECLARE(jz4775_uart, "ingenic,jz4775-uart",
 		    ingenic_early_console_setup);
@@ -319,6 +323,7 @@ static const struct ingenic_uart_config jz4780_uart_config = {
 static const struct of_device_id of_match[] = {
 	{ .compatible = "ingenic,jz4740-uart", .data = &jz4740_uart_config },
 	{ .compatible = "ingenic,jz4760-uart", .data = &jz4760_uart_config },
+	{ .compatible = "ingenic,jz4770-uart", .data = &jz4760_uart_config },
 	{ .compatible = "ingenic,jz4775-uart", .data = &jz4760_uart_config },
 	{ .compatible = "ingenic,jz4780-uart", .data = &jz4780_uart_config },
 	{ /* sentinel */ }