Input: appletouch - use canonical names in USB IDs

Small readability improvement for appletouch: use canonical names
instead of raw USB IDs for some of the devices.
Signed-off-by: Julien BLACHE <jb@jblache.org>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>

drivers/usb/input/appletouch.c

@@ -38,6 +38,13 @@
 #define APPLE_VENDOR_ID		0x05AC
 
 /* These names come from Info.plist in AppleUSBTrackpad.kext */
+#define FOUNTAIN_ANSI_PRODUCT_ID	0x020E
+#define FOUNTAIN_ISO_PRODUCT_ID		0x020F
+
+#define FOUNTAIN_TP_ONLY_PRODUCT_ID	0x030A
+
+#define GEYSER1_TP_ONLY_PRODUCT_ID	0x030B
+
 #define GEYSER_ANSI_PRODUCT_ID		0x0214
 #define GEYSER_ISO_PRODUCT_ID		0x0215
 #define GEYSER_JIS_PRODUCT_ID		0x0216
@@ -66,10 +73,10 @@
 
 /* table of devices that work with this driver */
 static struct usb_device_id atp_table [] = {
-	{ ATP_DEVICE(0x020E) },
-	{ ATP_DEVICE(0x020F) },
-	{ ATP_DEVICE(0x030A) },
-	{ ATP_DEVICE(0x030B) },
+	{ ATP_DEVICE(FOUNTAIN_ANSI_PRODUCT_ID) },
+	{ ATP_DEVICE(FOUNTAIN_ISO_PRODUCT_ID) },
+	{ ATP_DEVICE(FOUNTAIN_TP_ONLY_PRODUCT_ID) },
+	{ ATP_DEVICE(GEYSER1_TP_ONLY_PRODUCT_ID) },
 
 	/* PowerBooks Oct 2005 */
 	{ ATP_DEVICE(GEYSER_ANSI_PRODUCT_ID) },