serial: 8250_platform: remove ACPI_PTR() annotation

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: d9e5a0ce2f16 ("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.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>