crypto: arm64/aes - remove Makefile hack

Do it more simiply. This also fixes single target builds.

[before]

  $ make ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- arch/arm64/crypto/aes-glue-ce.i
    [snip]
  make[4]: *** No rule to make target 'arch/arm64/crypto/aes-glue-ce.i'.  Stop.

[after]

  $ make ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- arch/arm64/crypto/aes-glue-ce.i
    [snip]
    CPP     arch/arm64/crypto/aes-glue-ce.i
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Acked-by: Will Deacon <will@kernel.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

arch/arm64/crypto/Makefile

@@ -81,11 +81,6 @@ aes-arm64-y := aes-cipher-core.o aes-cipher-glue.o
 obj-$(CONFIG_CRYPTO_AES_ARM64_BS) += aes-neon-bs.o
 aes-neon-bs-y := aes-neonbs-core.o aes-neonbs-glue.o
 
-CFLAGS_aes-glue-ce.o	:= -DUSE_V8_CRYPTO_EXTENSIONS
-
-$(obj)/aes-glue-%.o: $(src)/aes-glue.c FORCE
-	$(call if_changed_rule,cc_o_c)
-
 quiet_cmd_perlasm = PERLASM $@
       cmd_perlasm = $(PERL) $(<) void $(@)
 

arch/arm64/crypto/aes-glue-ce.c

+#define USE_V8_CRYPTO_EXTENSIONS
+#include "aes-glue.c"

arch/arm64/crypto/aes-glue-neon.c

+#include "aes-glue.c"