objtool: Don't print '.tmp_' prefix for .o files

With the following commit:

  2a0098d70640 ("objtool: Fix seg fault with gold linker")

... objtool warnings started showing the modversions '.tmp_' prefix in
the .o file name, like:

  arch/x86/mm/.tmp_mem_encrypt_boot.o: warning: objtool: sme_encrypt_execute()+0x48: indirect call found in RETPOLINE build

The prefix is confusing.  Remove it from the printed 'objname' variable.

Fixes: 2a0098d70640 ("objtool: Fix seg fault with gold linker")
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
1 file changed