pciinit: Do not access Dino Flex register on 64-bit firmware

Signed-off-by: Helge Deller <deller@gmx.de>
diff --git a/src/fw/pciinit.c b/src/fw/pciinit.c
index 1535fa4..56c1f44 100644
--- a/src/fw/pciinit.c
+++ b/src/fw/pciinit.c
@@ -527,6 +527,9 @@
     pcimem_start = 0xf2000000ULL;
     pcimem_end   = 0xff800000ULL;
 
+    if (has_astro || sizeof(long) != 4)
+        return;
+
     /* Setup DINO PCI I/O and mem window */
 
     outl(DINO_HPA | 1, 0xfffc0020); /* Set Dino Flex (Address) */