hw/isa/piix: Rename functions to be shared for PCI interrupt triggering

PIIX4 will get the same optimizations which are already implemented for
PIIX3.

Signed-off-by: Bernhard Beschow <shentey@gmail.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Message-Id: <20231007123843.127151-26-shentey@gmail.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
1 file changed