qemu-ga: generate missing stubs for fsfreeze

When linux-specific commands (including guest-fsfreeze-*) were consolidated
under defined(__linux__), we forgot to account for the case where
defined(__linux__) && !defined(FIFREEZE). As a result stubs are no longer
being generated on linux hosts that don't have FIFREEZE support. Fix
this.
Tested-by: NAndreas Färber <afaerber@suse.de>
Reviewed-by: NLuiz Capitulino <lcapitulino@redhat.com>

qga/commands-posix.c

@@ -881,46 +881,50 @@ error:
 
 #else /* defined(__linux__) */
 
-GuestFsfreezeStatus qmp_guest_fsfreeze_status(Error **err)
+void qmp_guest_suspend_disk(Error **err)
 {
     error_set(err, QERR_UNSUPPORTED);
-
-    return 0;
 }
 
-int64_t qmp_guest_fsfreeze_freeze(Error **err)
+void qmp_guest_suspend_ram(Error **err)
 {
     error_set(err, QERR_UNSUPPORTED);
-
-    return 0;
 }
 
-int64_t qmp_guest_fsfreeze_thaw(Error **err)
+void qmp_guest_suspend_hybrid(Error **err)
 {
     error_set(err, QERR_UNSUPPORTED);
-
-    return 0;
 }
 
-void qmp_guest_suspend_disk(Error **err)
+GuestNetworkInterfaceList *qmp_guest_network_get_interfaces(Error **errp)
 {
-    error_set(err, QERR_UNSUPPORTED);
+    error_set(errp, QERR_UNSUPPORTED);
+    return NULL;
 }
 
-void qmp_guest_suspend_ram(Error **err)
+#endif
+
+#if !defined(CONFIG_FSFREEZE)
+
+GuestFsfreezeStatus qmp_guest_fsfreeze_status(Error **err)
 {
     error_set(err, QERR_UNSUPPORTED);
+
+    return 0;
 }
 
-void qmp_guest_suspend_hybrid(Error **err)
+int64_t qmp_guest_fsfreeze_freeze(Error **err)
 {
     error_set(err, QERR_UNSUPPORTED);
+
+    return 0;
 }
 
-GuestNetworkInterfaceList *qmp_guest_network_get_interfaces(Error **errp)
+int64_t qmp_guest_fsfreeze_thaw(Error **err)
 {
-    error_set(errp, QERR_UNSUPPORTED);
-    return NULL;
+    error_set(err, QERR_UNSUPPORTED);
+
+    return 0;
 }
 
 #endif