clk: Move debug_node field under DEBUG_FS flag in struct clk_core

The debug_node field is only used when DEBUG_FS config is selected,
so declare it only if DEBUG_FS is selected.
Signed-off-by: Maxime Coquelin <maxime.coquelin@st.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>

drivers/clk/clk.c

@@ -62,11 +62,11 @@ struct clk_core {
 	int			phase;
 	struct hlist_head	children;
 	struct hlist_node	child_node;
-	struct hlist_node	debug_node;
 	struct hlist_head	clks;
 	unsigned int		notifier_count;
 #ifdef CONFIG_DEBUG_FS
 	struct dentry		*dentry;
+	struct hlist_node	debug_node;
 #endif
 	struct kref		ref;
 };