MIPS: Lantiq: Add missing clk_enable and clk_disable functions.

Signed-of-by: John Crispin <blogic@openwrt.org>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/2465/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

arch/mips/lantiq/clk.c

@@ -100,6 +100,19 @@ void clk_put(struct clk *clk)
 }
 EXPORT_SYMBOL(clk_put);
 
+int clk_enable(struct clk *clk)
+{
+	/* not used */
+	return 0;
+}
+EXPORT_SYMBOL(clk_enable);
+
+void clk_disable(struct clk *clk)
+{
+	/* not used */
+}
+EXPORT_SYMBOL(clk_disable);
+
 static inline u32 ltq_get_counter_resolution(void)
 {
 	u32 res;