[POWERPC] Remove prod_processor()

prod_processor() is unused, and that's a good thing, since it does not
supply the required proc id parameter to H_PROD.

Signed-off-by: Nathan Lynch <ntl@pobox.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>

arch/powerpc/platforms/pseries/plpar_wrappers.h

@@ -8,11 +8,6 @@ static inline long poll_pending(void)
 	return plpar_hcall_norets(H_POLL_PENDING);
 }
 
-static inline long prod_processor(void)
-{
-	return plpar_hcall_norets(H_PROD);
-}
-
 static inline long cede_processor(void)
 {
 	return plpar_hcall_norets(H_CEDE);