schemas: add Renesas RAA22X Gen2 I2C VR device

Add "RAA22XGen2Firmware" to I2C VR device types enum

Change-Id: I16a31e534bbd76f2b94b6446f1f105468d718a57
Signed-off-by: Cosmo Chou <cosmo.chou@quantatw.com>
diff --git a/schemas/firmware.json b/schemas/firmware.json
index 649d04a..a142499 100644
--- a/schemas/firmware.json
+++ b/schemas/firmware.json
@@ -33,7 +33,8 @@
                         "ISL69269Firmware",
                         "MP2X6XXFirmware",
                         "MP297XFirmware",
-                        "MP5998Firmware"
+                        "MP5998Firmware",
+                        "RAA22XGen2Firmware"
                     ]
                 },
                 "Bus": {