[Xen-devel][PATCH][VTD] Minor fixing of interrupt remapping

["Han, Weidong" <weidong.han@xxxxxxxxx>]

When ir_ctrl->iremap_index == -1, it means there is no remap entry. So
it needn't to convert from remap format to normal ioapic format.

Signed-off-by: Weidong Han <weidong.han@xxxxxxxxx>

Attachment: intremap.patch
Description: intremap.patch

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