Revert "ioport: remove LITTLE_ENDIAN mark for portio"

This reverts commit c3cb8e77804313e1be99b5f28a34a346736707a5.

The scenario where I/O ports are accessed with DEVICE_LITTLE_ENDIAN
endianness now works and will soon be unit tested.  Since the PortioList
indirection assumes little endian, define portio_ops the same way.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Anthony Liguori <aliguori@us.ibm.com>
Message-id: 1374501278-31549-16-git-send-email-pbonzini@redhat.com
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
diff --git a/ioport.c b/ioport.c
index 89b17d6..79b7f1a 100644
--- a/ioport.c
+++ b/ioport.c
@@ -183,6 +183,7 @@
 static const MemoryRegionOps portio_ops = {
     .read = portio_read,
     .write = portio_write,
+    .endianness = DEVICE_LITTLE_ENDIAN,
     .valid.unaligned = true,
     .impl.unaligned = true,
 };