ahci: Unbreak bar registration

Fix regression of 667bb59: ahci_init initializes ahci.mem, so we have to
move bar registration after it.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
diff --git a/hw/ide/ich.c b/hw/ide/ich.c
index e44339b..6150ce3 100644
--- a/hw/ide/ich.c
+++ b/hw/ide/ich.c
@@ -93,14 +93,14 @@
 
     qemu_register_reset(ahci_reset, d);
 
-    /* XXX BAR size should be 1k, but that breaks, so bump it to 4k for now */
-    pci_register_bar_simple(&d->card, 5, 0x1000, 0, d->ahci.mem);
-
     msi_init(dev, 0x50, 1, true, false);
 
     ahci_init(&d->ahci, &dev->qdev, 6);
     d->ahci.irq = d->card.irq[0];
 
+    /* XXX BAR size should be 1k, but that breaks, so bump it to 4k for now */
+    pci_register_bar_simple(&d->card, 5, 0x1000, 0, d->ahci.mem);
+
     return 0;
 }