qemuFirmwareFetchConfigs: Fix check for @privileged

The qemuFirmwareFetchConfigs() function is supposed to fetch all
firmware descriptions from paths defined by firmware.json
specification. This includes user's $HOME directory. However, it
was agreed that if libvirtd is running as privileged user then
his $HOME is ignored (thus $HOME is included in the search only
for regular users). Well, I got the condition wrong - it should
have been reversed.
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>
Reviewed-by: NAndrea Bolognani <abologna@redhat.com>

src/qemu/qemu_firmware.c

@@ -974,7 +974,7 @@ qemuFirmwareFetchConfigs(char ***firmwares,
 
     *firmwares = NULL;
 
-    if (privileged) {
+    if (!privileged) {
         /* This is a slight divergence from the specification.
          * Since the system daemon runs as root, it doesn't make
          * much sense to parse files in root's home directory. It