Move all the motors stuff into a saner namespace

Letting the mechanical engineers name software is never a good idea...

Change-Id: I5d0e43d84a8f45693435472cc0e5e288f6190b14
diff --git a/motors/button_board.cc b/motors/button_board.cc
index 7e4a43c..6d5d11e 100644
--- a/motors/button_board.cc
+++ b/motors/button_board.cc
@@ -69,12 +69,12 @@
                       teensy::HidFunction *joystick1) {
   uint32_t start = micros();
   while (true) {
-    salsa::JoystickAdcReadings adc;
+    JoystickAdcReadings adc;
     char report0[report_size()];
     char report1[report_size()];
     {
       DisableInterrupts disable_interrupts;
-      adc = salsa::AdcReadJoystick(disable_interrupts);
+      adc = AdcReadJoystick(disable_interrupts);
     }
 
     FTM0->C1V = adc.analog0 / 4;
@@ -334,7 +334,7 @@
   usb_device.Initialize();
 
   can_init(0, 1);
-  salsa::AdcInitJoystick();
+  AdcInitJoystick();
   SetupLedFtm(FTM0);
   SetupLedFtm(FTM3);