lsi: enable busmaster

The HBA does DMA, thus we must enable the busmaster bit,
otherwise dma access will fail with recent qemu versions.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
diff --git a/src/lsi-scsi.c b/src/lsi-scsi.c
index b70b3a5..f8d715b 100644
--- a/src/lsi-scsi.c
+++ b/src/lsi-scsi.c
@@ -177,6 +177,8 @@
     u32 iobase = pci_config_readl(pci->bdf, PCI_BASE_ADDRESS_0)
         & PCI_BASE_ADDRESS_IO_MASK;
 
+    pci_config_maskw(bdf, PCI_COMMAND, 0, PCI_COMMAND_MASTER);
+
     dprintf(1, "found lsi53c895a at %02x:%02x.%x, io @ %x\n",
             pci_bdf_to_bus(bdf), pci_bdf_to_dev(bdf),
             pci_bdf_to_fn(bdf), iobase);