lib/crypto: ensure generated *.S files are removed on make clean

make clean does not check the kernel config when removing files. As
such, additions to clean-files under CONFIG_ARM or CONFIG_ARM64 are not
evaluated. For example, when building on arm64, this means that
lib/crypto/arm64/sha{256,512}-core.S are left over after make clean.

Set clean-files unconditionally to ensure that make clean removes these
files.

Fixes: e96cb95 ("lib/crypto: sha256: Consolidate into single module")
Fixes: 24c91b6 ("lib/crypto: arm/sha512: Migrate optimized SHA-512 code to library")
Fixes: 60e3f1e ("lib/crypto: arm64/sha512: Migrate optimized SHA-512 code to library")
Signed-off-by: Tal Zussman <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Eric Biggers <[email protected]>

Author: tzussman

lib/crypto/Makefile

@@ -100,15 +100,13 @@ ifeq ($(CONFIG_ARM),y)
 libsha256-y += arm/sha256-ce.o arm/sha256-core.o
 $(obj)/arm/sha256-core.S: $(src)/arm/sha256-armv4.pl
 	$(call cmd,perlasm)
-clean-files += arm/sha256-core.S
 AFLAGS_arm/sha256-core.o += $(aflags-thumb2-y)
 endif
 
 ifeq ($(CONFIG_ARM64),y)
 libsha256-y += arm64/sha256-core.o
 $(obj)/arm64/sha256-core.S: $(src)/arm64/sha2-armv8.pl
 	$(call cmd,perlasm_with_args)
-clean-files += arm64/sha256-core.S
 libsha256-$(CONFIG_KERNEL_MODE_NEON) += arm64/sha256-ce.o
 endif
 
@@ -132,15 +130,13 @@ ifeq ($(CONFIG_ARM),y)
 libsha512-y += arm/sha512-core.o
 $(obj)/arm/sha512-core.S: $(src)/arm/sha512-armv4.pl
 	$(call cmd,perlasm)
-clean-files += arm/sha512-core.S
 AFLAGS_arm/sha512-core.o += $(aflags-thumb2-y)
 endif
 
 ifeq ($(CONFIG_ARM64),y)
 libsha512-y += arm64/sha512-core.o
 $(obj)/arm64/sha512-core.S: $(src)/arm64/sha2-armv8.pl
 	$(call cmd,perlasm_with_args)
-clean-files += arm64/sha512-core.S
 libsha512-$(CONFIG_KERNEL_MODE_NEON) += arm64/sha512-ce-core.o
 endif
 
@@ -167,3 +163,7 @@ obj-$(CONFIG_PPC) += powerpc/
 obj-$(CONFIG_RISCV) += riscv/
 obj-$(CONFIG_S390) += s390/
 obj-$(CONFIG_X86) += x86/
+
+# clean-files must be defined unconditionally
+clean-files += arm/sha256-core.S arm/sha512-core.S
+clean-files += arm64/sha256-core.S arm64/sha512-core.S