platform/x86: sony: mark SPI related data as maybe unused

The driver can be compile tested as built-in making certain data unused:

  drivers/platform/x86/sony-laptop.c:3290:36: error: ‘sony_device_ids’ defined but not used [-Werror=unused-const-variable=]
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20230312132624.352703-3-krzysztof.kozlowski@linaro.orgReviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>

drivers/platform/x86/sony-laptop.c

@@ -3287,7 +3287,7 @@ static void sony_nc_remove(struct acpi_device *device)
 	dprintk(SONY_NC_DRIVER_NAME " removed.\n");
 }
 
-static const struct acpi_device_id sony_device_ids[] = {
+static const struct acpi_device_id sony_device_ids[] __maybe_unused = {
 	{SONY_NC_HID, 0},
 	{SONY_PIC_HID, 0},
 	{"", 0},