[Keyboard] Iris via changes (#8597)

* Change PID to allow differentiation between Rev. 3 and Rev. 4

* Rebadge thumb keys in macro to show physical wiring better

* Add more rules for VIA keymap

keyboards/keebio/iris/rev4/config.h

@@ -19,10 +19,10 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 /* USB Device descriptor parameter */
 #define VENDOR_ID       0xCB10
-#define PRODUCT_ID      0x1256
+#define PRODUCT_ID      0x4256
 #define DEVICE_VER      0x0400
 #define MANUFACTURER    Keebio
-#define PRODUCT         Iris Keyboard
+#define PRODUCT         Keebio Iris Rev. 4
 #define DESCRIPTION     Split 50 percent ergonomic keyboard
 
 /* key matrix size */