vmware-vga: Accept unaligned I/O accesses

Before switching to the memory core dispatcher, we need to make sure
that this pv-device will continue to receive unaligned portio accesses.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

hw/display/vmware_vga.c

@@ -1241,6 +1241,10 @@ static const MemoryRegionOps vmsvga_io_ops = {
     .valid = {
         .min_access_size = 4,
         .max_access_size = 4,
+        .unaligned = true,
+    },
+    .impl = {
+        .unaligned = true,
     },
 };