crypto: vmx: Skip objtool from running on aesp8-ppc.o

With objtool enabled, below warnings are seen when trying to build:
drivers/crypto/vmx/aesp8-ppc.o: warning: objtool: aes_p8_set_encrypt_key+0x44: unannotated intra-function call
drivers/crypto/vmx/aesp8-ppc.o: warning: objtool: .text+0x2448: unannotated intra-function call
drivers/crypto/vmx/aesp8-ppc.o: warning: objtool: .text+0x2d68: unannotated intra-function call

Skip objtool from running on drivers/crypto/vmx/aesp8-ppc.o file for the
following reasons:

- Since this file comes from OpenSSL, and since it is a perl file which
generates a .S file, it may not be the best choice to make too many
code changes to such files, unless absolutely necessary.

- As far as the objtool --mcount functionality is concerned, we do not
have to run objtool on this file because there are no calls to
_mcount().

Tested-by: Naveen N. Rao <[e-mail]>
Reviewed-by: Naveen N. Rao <[e-mail]>
Reviewed-by: Christophe Leroy <[e-mail]>
Acked-by: Josh Poimboeuf <[e-mail]>
Signed-off-by: Sathvika Vasireddy <[e-mail]>
Signed-off-by: Michael Ellerman <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]

drivers/crypto/vmx/Makefile

···
 
 $(obj)/aesp8-ppc.S $(obj)/ghashp8-ppc.S: $(obj)/%.S: $(src)/%.pl FORCE
 	$(call if_changed,perl)
+
+OBJECT_FILES_NON_STANDARD_aesp8-ppc.o := y