serial: 8250_platform: remove ACPI_PTR() annotation

The acpi_platform_serial_table[] array is defined globally without
an #ifdef check for CONFIG_ACPI, so ACPI_PTR() makes no sense
here:

drivers/tty/serial/8250/8250_platform.c:271:36: error: 'acpi_platform_serial_table' defined but not used [-Werror=unused-const-variable=]
  271 | static const struct acpi_device_id acpi_platform_serial_table[] = {

Fixes: d9e5a0ce ("serial: 8250_platform: Enable generic 16550A platform devices")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Sunil V L <sunilvl@ventanamicro.com>
Link: https://lore.kernel.org/r/20240807075751.2206508-1-arnd@kernel.orgSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/tty/serial/8250/8250_platform.c

@@ -281,7 +281,7 @@ static struct platform_driver serial8250_isa_driver = {
 	.resume		= serial8250_resume,
 	.driver		= {
 		.name	= "serial8250",
-		.acpi_match_table = ACPI_PTR(acpi_platform_serial_table),
+		.acpi_match_table = acpi_platform_serial_table,
 	},
 };