drivers: PL011: add ACPI probing for SBSA UART

Add the necessary driver boilerplate to let the driver be used when
the respective ACPI table is discovered by the ACPI subsystem.

[Andre: change table name, add MODULE_DEVICE_TABLE entry and improve
commit message]

Reviewed-by: Hanjun Guo <[e-mail]>
Signed-off-by: Graeme Gregory <[e-mail]>
Tested-by: Mark Langsdorf <[e-mail]>
Tested-by: Naresh Bhat <[e-mail]>
Signed-off-by: Andre Przywara <[e-mail]>
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/tty/serial/amba-pl011.c

···
 #include <linux/pinctrl/consumer.h>
 #include <linux/sizes.h>
 #include <linux/io.h>
+#include <linux/acpi.h>
 
 #define UART_NR			14
 
···
 };
 MODULE_DEVICE_TABLE(of, sbsa_uart_of_match);
 
+static const struct acpi_device_id sbsa_uart_acpi_match[] = {
+	{ "ARMH0011", 0 },
+	{},
+};
+MODULE_DEVICE_TABLE(acpi, sbsa_uart_acpi_match);
+
 static struct platform_driver arm_sbsa_uart_platform_driver = {
 	.probe		= sbsa_uart_probe,
 	.remove		= sbsa_uart_remove,
 	.driver	= {
 		.name	= "sbsa-uart",
 		.of_match_table = of_match_ptr(sbsa_uart_of_match),
+		.acpi_match_table = ACPI_PTR(sbsa_uart_acpi_match),
 	},
 };