powerpc: export debug registers save function for KVM
KVM need this function when switching from vcpu to user-space thread. My subsequent patch will use this function. Signed-off-by: NBharat Bhushan <bharat.bhushan@freescale.com> Acked-by: NMichael Neuling <mikey@neuling.org> Signed-off-by: NAlexander Graf <agraf@suse.de>
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