Fixed input ports

This way they work as an `address=INPUT_X` parameter when instancing new Devices.

Author: antonvh

ev3dev/brickpi.py

@@ -34,10 +34,10 @@
 OUTPUT_C = 'ttyAMA0:outC'
 OUTPUT_D = 'ttyAMA0:outD'
 
-INPUT_1 = 'ttyAMA0:in1'
-INPUT_2 = 'ttyAMA0:in2'
-INPUT_3 = 'ttyAMA0:in3'
-INPUT_4 = 'ttyAMA0:in4'
+INPUT_1 = 'in1'
+INPUT_2 = 'in2'
+INPUT_3 = 'in3'
+INPUT_4 = 'in4'
 
 
 class Leds(object):