uclogic: Handle kernels w/o HID_QUIRK_NO_EMPTY_INPUT

Handle building without HID_QUIRK_NO_EMPTY_INPUT, which is removed from
newer kernels, where it's behavior is the default.

Fixes #160

Author: spbnick

hid-uclogic-core.c

@@ -173,7 +173,9 @@ static int uclogic_probe(struct hid_device *hdev,
 	 * than the pen, so use QUIRK_MULTI_INPUT for all tablets.
 	 */
 	hdev->quirks |= HID_QUIRK_MULTI_INPUT;
+#ifdef HID_QUIRK_NO_EMPTY_INPUT
 	hdev->quirks |= HID_QUIRK_NO_EMPTY_INPUT;
+#endif
 
 	/* Allocate and assign driver data */
 	drvdata = devm_kzalloc(&hdev->dev, sizeof(*drvdata), GFP_KERNEL);