PPC32: remove unused defns of EISA/MCA_bus__is_a_macro

include/asm-ppc/processor.h

@@ -635,9 +635,7 @@ extern long kernel_thread(int (*fn)(void *), void *arg, unsigned long flags);
  * Bus types
  */
 #define EISA_bus 0
-#define EISA_bus__is_a_macro /* for versions in ksyms.c */
 #define MCA_bus 0
-#define MCA_bus__is_a_macro /* for versions in ksyms.c */
 
 /* Lazy FPU handling on uni-processor */
 extern struct task_struct *last_task_used_math;