ide: add IDE_HFLAG_SERIALIZE host flag

Add IDE_HFLAG_SERIALIZE host flag to tell ide_pci_setup_ports() to set
hwif/mate->serialized and convert aec62xx, cs5530 and sc1200 host drivers
to use it.

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
diff --git a/drivers/ide/setup-pci.c b/drivers/ide/setup-pci.c
index 1da9935..aae4806f 100644
--- a/drivers/ide/setup-pci.c
+++ b/drivers/ide/setup-pci.c
@@ -565,6 +565,9 @@
 		hwif->host_flags = d->host_flags;
 		hwif->pio_mask = d->pio_mask;
 
+		if ((d->host_flags & IDE_HFLAG_SERIALIZE) && hwif->mate)
+			hwif->mate->serialized = hwif->serialized = 1;
+
 		if (hwif->dma_base) {
 			hwif->swdma_mask = d->swdma_mask;
 			hwif->mwdma_mask = d->mwdma_mask;