openpic: add Shared MSI support
The OpenPIC allows MSI access through shared MSI registers. Implement
them for the MPC8544 MPIC, so we can support MSIs.
Signed-off-by: NAlexander Graf <agraf@suse.de>
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The OpenPIC allows MSI access through shared MSI registers. Implement
them for the MPC8544 MPIC, so we can support MSIs.
Signed-off-by: NAlexander Graf <agraf@suse.de>