s390: remove unused parameter from Makefile

Remove unused parameter from the call function,
which I accidentally added.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

arch/s390/tools/Makefile

@@ -21,4 +21,4 @@ include/generated/facilities.h: $(obj)/gen_facilities FORCE
 	$(call filechk,facilities.h)
 
 include/generated/dis.h: $(obj)/gen_opcode_table FORCE
-	$(call filechk,dis.h,__FUN)
+	$(call filechk,dis.h)