crypto/rc5/Makefile was erroneously omitted from last perlasm unification.

Also remove obsolete and now misleading comments.

crypto/bf/Makefile

@@ -12,8 +12,6 @@ MAKEFILE=	Makefile
 AR=		ar r
 
 BF_ENC=		bf_enc.o
-# or use
-#DES_ENC=	bx86-elf.o
 
 CFLAGS= $(INCLUDES) $(CFLAG)
 ASFLAGS= $(INCLUDES) $(ASFLAG)

crypto/bn/Makefile

@@ -12,8 +12,6 @@ MAKEFILE=	Makefile
 AR=		ar r
 
 BN_ASM=		bn_asm.o
-# or use
-#BN_ASM=	bn86-elf.o
 
 CFLAGS= $(INCLUDES) $(CFLAG)
 ASFLAGS= $(INCLUDES) $(ASFLAG)

crypto/des/Makefile

@@ -12,8 +12,6 @@ MAKEFILE=	Makefile
 AR=		ar r
 RANLIB=		ranlib
 DES_ENC=	des_enc.o fcrypt_b.o
-# or use
-#DES_ENC=	dx86-elf.o yx86-elf.o
 
 CFLAGS= $(INCLUDES) $(CFLAG)
 ASFLAGS= $(INCLUDES) $(ASFLAG)

crypto/rc5/Makefile

@@ -12,8 +12,6 @@ MAKEFILE=	Makefile
 AR=		ar r
 
 RC5_ENC=		rc5_enc.o
-# or use
-#DES_ENC=	r586-elf.o
 
 CFLAGS= $(INCLUDES) $(CFLAG)
 ASFLAGS= $(INCLUDES) $(ASFLAG)
@@ -44,15 +42,8 @@ lib:	$(LIBOBJ)
 	$(RANLIB) $(LIB) || echo Never mind.
 	@touch lib
 
-# ELF
-r586-elf.s: asm/rc5-586.pl ../perlasm/x86asm.pl ../perlasm/cbc.pl
-	(cd asm; $(PERL) rc5-586.pl elf $(CFLAGS) > ../$@)
-# COFF
-r586-cof.s: asm/rc5-586.pl ../perlasm/x86asm.pl ../perlasm/cbc.pl
-	(cd asm; $(PERL) rc5-586.pl coff $(CFLAGS) > ../$@)
-# a.out
-r586-out.s: asm/rc5-586.pl ../perlasm/x86asm.pl ../perlasm/cbc.pl
-	(cd asm; $(PERL) rc5-586.pl a.out $(CFLAGS) > ../$@)
+rc5-586.s: asm/rc5-586.pl ../perlasm/x86asm.pl ../perlasm/cbc.pl
+	$(PERL) asm/rc5-586.pl $(PERLASM_SCHEME) $(CFLAGS) > $@
 
 files:
 	$(PERL) $(TOP)/util/files.pl Makefile >> $(TOP)/MINFO