ioapic: fix build with DEBUG_IOAPIC

ioapic.c:198: error: format ‘%08x’ expects type ‘unsigned int’, but argument 3 has type ‘uint64_t’

Signed-off-by: Jason Wang <jasowang@redhat.com>
Reviewed-by: Andreas Färber <afaerber@suse.de>
Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>

hw/ioapic.c

@@ -195,7 +195,7 @@ ioapic_mem_write(void *opaque, target_phys_addr_t addr, uint64_t val,
         if (size != 4) {
             break;
         }
-        DPRINTF("write: %08x = %08x\n", s->ioregsel, val);
+        DPRINTF("write: %08x = %08" PRIx64 "\n", s->ioregsel, val);
         switch (s->ioregsel) {
         case IOAPIC_REG_ID:
             s->id = (val >> IOAPIC_ID_SHIFT) & IOAPIC_ID_MASK;