Add test points for USB data quality assurance (especially type C.)

hardware/conn-mchip.sch

@@ -852,4 +852,28 @@ Connection ~ 7150 4250
 Wire Wire Line
 	6650 4150 6650 4250
 Connection ~ 6650 4150
+$Comp
+L Connector:TestPoint_Flag TP17
+U 1 1 5FF58840
+P 2500 3100
+F 0 "TP17" H 2540 3170 50  0000 L CNN
+F 1 "TPoint" H 2775 3175 50  0000 L CNN
+F 2 "TestPoint:TestPoint_Pad_2.0x2.0mm" H 2700 3100 50  0001 C CNN
+F 3 "~" H 2700 3100 50  0001 C CNN
+	1    2500 3100
+	1    0    0    -1  
+$EndComp
+Connection ~ 2500 3100
+$Comp
+L Connector:TestPoint_Flag TP18
+U 1 1 5FF592FC
+P 2500 3400
+F 0 "TP18" H 2540 3480 50  0000 L CNN
+F 1 "TPoint" H 2775 3475 50  0000 L CNN
+F 2 "TestPoint:TestPoint_Pad_2.0x2.0mm" H 2700 3400 50  0001 C CNN
+F 3 "~" H 2700 3400 50  0001 C CNN
+	1    2500 3400
+	1    0    0    1   
+$EndComp
+Connection ~ 2500 3400
 $EndSCHEMATC