powerpc/powernv: Add option CONFIG_POWERNV_MSI
As Michael Ellerman suggested, to add CONFIG_POWERNV_MSI for PowerNV platform. That's similar to CONFIG_PSERIES_MSI for pSeries platform. For now, we don't make it dependent on CONFIG_EEH since it's not ready to enable that yet. Apart from that, we also enable CONFIG_PPC_MSI_BITMAP on selecting CONFIG_POWERNV_MSI. Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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