powerpc/powernv: Define and set POWER9 HFSCR doorbell bit
Define and set the POWER9 HFSCR doorbell bit so that guests can use msgsndp. ISA 3.0 calls this MSGP, so name it accordingly in the code. Signed-off-by: Michael Neuling <mikey@neuling.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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1f0f2e72
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