x86/retpoline: Cleanup some #ifdefery
On it's own not much of a cleanup but it prepares for more/similar code. Signed-off-by: NPeter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: NBorislav Petkov <bp@suse.de> Reviewed-by: NBorislav Petkov <bp@suse.de> Reviewed-by: NJosh Poimboeuf <jpoimboe@kernel.org> Signed-off-by: NBorislav Petkov <bp@suse.de>
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