crypto: arm64 - use a pattern rule for generating *.S files

Unify similar build rules.

sha256-core.S opts out it because it is generated from sha512-armv8.pl.
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

arch/arm64/crypto/Makefile

@@ -71,13 +71,10 @@ $(obj)/aes-glue-%.o: $(src)/aes-glue.c FORCE
 quiet_cmd_perlasm = PERLASM $@
       cmd_perlasm = $(PERL) $(<) void $(@)
 
-$(obj)/poly1305-core.S: $(src)/poly1305-armv8.pl
+$(obj)/%-core.S: $(src)/%-armv8.pl
 	$(call cmd,perlasm)
 
 $(obj)/sha256-core.S: $(src)/sha512-armv8.pl
 	$(call cmd,perlasm)
 
-$(obj)/sha512-core.S: $(src)/sha512-armv8.pl
-	$(call cmd,perlasm)
-
 clean-files += poly1305-core.S sha256-core.S sha512-core.S