boot: Fix qemu bootindex parameter on parisc architecture

On parisc qemu reports the main PCI bus as "/dino-pcihost" instead of
"/pci@i0cf8".  This is important when using the bootindex parameter for
SCSI discs, because the seabios boot code uses this name as prefix when
identifying and sorting the bootable discs.

Signed-off-by: Helge Deller <deller@gmx.de>
diff --git a/src/boot.c b/src/boot.c
index f2ded31..31f63ea 100644
--- a/src/boot.c
+++ b/src/boot.c
@@ -49,7 +49,11 @@
     }
 }
 
+#if CONFIG_PARISC
+#define FW_PCI_DOMAIN "/dino-pcihost"
+#else
 #define FW_PCI_DOMAIN "/pci@i0cf8"
+#endif
 
 static char *
 build_pci_path(char *buf, int max, const char *devname, struct pci_device *pci)