serial: sifive: Remove 0 from fu540-c000-uart0 binding.

The driver is using "sifive,fu540-c000-uart0" as a binding. The device
tree and documentation states "sifive,fu540-c000-uart" instead. This
means the binding is not matched and not used.

This did not cause any problems because the alternative binding, used in
the device tree, "sifive,uart0" is not handling the hardware any
different.

Align the binding in the driver with the documentation.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Reviewed-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://lore.kernel.org/r/20240307090950.eLELkuyK@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/tty/serial/sifive.c

@@ -761,7 +761,7 @@ static int __init early_sifive_serial_setup(struct earlycon_device *dev,
 }
 
 OF_EARLYCON_DECLARE(sifive, "sifive,uart0", early_sifive_serial_setup);
-OF_EARLYCON_DECLARE(sifive, "sifive,fu540-c000-uart0",
+OF_EARLYCON_DECLARE(sifive, "sifive,fu540-c000-uart",
 		    early_sifive_serial_setup);
 #endif /* CONFIG_SERIAL_EARLYCON */
 
@@ -1032,7 +1032,7 @@ static DEFINE_SIMPLE_DEV_PM_OPS(sifive_uart_pm_ops, sifive_serial_suspend,
 				sifive_serial_resume);
 
 static const struct of_device_id sifive_serial_of_match[] = {
-	{ .compatible = "sifive,fu540-c000-uart0" },
+	{ .compatible = "sifive,fu540-c000-uart" },
 	{ .compatible = "sifive,uart0" },
 	{},
 };