The other required set of changes

As per the PR, the changes still holding it up.
Add onekey for testing.
Fix ARM builds.
Fix device descriptor when either axes or buttons is zero.
Add compile-time check for at least one axis or button.
Move definition to try to fix conflict.
PR review comments.
qmk cformat

drivers/avr/analog.c

@@ -129,9 +129,9 @@ int16_t adc_read(uint8_t mux) {
     low = ADCL;
     // Must read MSB only once!
     low |= (ADCH << 8);
-    
-    //turn off the ADC
-    ADCSRA &= ~(1<<ADEN);
-    
+
+    // turn off the ADC
+    ADCSRA &= ~(1 << ADEN);
+
     return low;
 }