ide pc: Put hard disk info into CMOS only for hard disks

In particular, don't set disk type and geometry when a CD-ROM on bus
ide.0 has media during CMOS initialization.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>

hw/ide/qdev.c

@@ -117,7 +117,7 @@ int ide_get_geometry(BusState *bus, int unit,
 {
     IDEState *s = &DO_UPCAST(IDEBus, qbus, bus)->ifs[unit];
 
-    if (!s->bs) {
+    if (s->drive_kind != IDE_HD || !s->bs) {
         return -1;
     }