Changing the default i2c bus for the CHIP as the 4.4 kernel CHIPs rem…

…ove i2c-1 in the stock dts

Adafruit_GPIO/I2C.py

@@ -54,8 +54,10 @@ def get_default_bus():
         # Beaglebone Black has multiple I2C buses, default to 1 (P9_19 and P9_20).
         return 1
     elif plat == Platform.CHIP:
-        # CHIP has 2 user accessible I2C busses, default to 1 (U13_9 and U13_11)
-        return 1
+        # CHIP has 2 user accessible I2C busses, default to 2 (U1425 and U14_26)
+		# The 4.4 Kernel CHIPs remove i2c-1 for the ability to set with a dtb overlay
+		# and therefore isn't accessible without one
+        return 2
     else:
         raise RuntimeError('Could not determine default I2C bus for platform.')