x86/xen: fix xsave capability setting
Commit 690b7f10b4f9f ("x86/xen: use capabilities instead of fake cpuid values for xsave") introduced a regression as it tried to make use of the fixup feature before it being available. Fall back to the old variant testing via cpuid(). Signed-off-by: NJuergen Gross <jgross@suse.com> Reviewed-by: NBoris Ostrovsky <boris.ostrovsky@oracle.com> Signed-off-by: NJuergen Gross <jgross@suse.com>
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