Remove superfluous JTAG disable code (#6445)

* Remove superfluous JTAG disable code

* 32A has differently named register

* Accidentally some operators

* 32A also has different JTAG pins

* Wrap disable_jtag() in an ifndef

* Document this new define

* Rename the define, it conflicts with a LUFA thing

Also, move the ifndef wrapping to the call in keyboard_setup()

keyboards/launchpad/rev1/rev1.c

@@ -1,14 +1,9 @@
 #include "launchpad.h"
 
 void matrix_init_kb(void) {
-	
-	// JTAG disable for PORT F. write JTD bit twice within four cycles.
-    MCUCR |= (1<<JTD);
-    MCUCR |= (1<<JTD);
-	
 	// Undo init of RX LED, we use that port currently
 	//DDRB &= ~(1<<0);
 	
 	matrix_init_user();
 	
-};
+};