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: Andreas Färber <afaerber@suse.de>
Reviewed-by: Luiz Capitulino <lcapitulino@redhat.com>
diff --git a/qga/commands-posix.c b/qga/commands-posix.c
index faf970d..087c3af 100644
--- a/qga/commands-posix.c
+++ b/qga/commands-posix.c
@@ -881,27 +881,6 @@
 
 #else /* defined(__linux__) */
 
-GuestFsfreezeStatus qmp_guest_fsfreeze_status(Error **err)
-{
-    error_set(err, QERR_UNSUPPORTED);
-
-    return 0;
-}
-
-int64_t qmp_guest_fsfreeze_freeze(Error **err)
-{
-    error_set(err, QERR_UNSUPPORTED);
-
-    return 0;
-}
-
-int64_t qmp_guest_fsfreeze_thaw(Error **err)
-{
-    error_set(err, QERR_UNSUPPORTED);
-
-    return 0;
-}
-
 void qmp_guest_suspend_disk(Error **err)
 {
     error_set(err, QERR_UNSUPPORTED);
@@ -925,6 +904,31 @@
 
 #endif
 
+#if !defined(CONFIG_FSFREEZE)
+
+GuestFsfreezeStatus qmp_guest_fsfreeze_status(Error **err)
+{
+    error_set(err, QERR_UNSUPPORTED);
+
+    return 0;
+}
+
+int64_t qmp_guest_fsfreeze_freeze(Error **err)
+{
+    error_set(err, QERR_UNSUPPORTED);
+
+    return 0;
+}
+
+int64_t qmp_guest_fsfreeze_thaw(Error **err)
+{
+    error_set(err, QERR_UNSUPPORTED);
+
+    return 0;
+}
+
+#endif
+
 /* register init/cleanup routines for stateful command groups */
 void ga_command_state_init(GAState *s, GACommandState *cs)
 {