powerpc/powernv: Tell OPAL about our MMU mode on POWER9
That will allow OPAL to configure the CPU in an optimal way. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Michael Neuling <mikey@neuling.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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