include: dt-bindings: rockchip: mark RK_FUNC defines as deprecated

The defines RK_FUNC_1, RK_FUNC_2, RK_FUNC_3 and RK_FUNC_4
are no longer used. Mark them as "deprecated"
to prevent that someone start using them again.
Signed-off-by: Johan Jonker <jbx6244@gmail.com>
Link: https://lore.kernel.org/r/20191015205852.4200-2-jbx6244@gmail.comSigned-off-by: Heiko Stuebner <heiko@sntech.de>

include/dt-bindings/pinctrl/rockchip.h

@@ -50,9 +50,9 @@
 #define RK_PD7		31
 
 #define RK_FUNC_GPIO	0
-#define RK_FUNC_1	1
-#define RK_FUNC_2	2
-#define RK_FUNC_3	3
-#define RK_FUNC_4	4
+#define RK_FUNC_1	1 /* deprecated */
+#define RK_FUNC_2	2 /* deprecated */
+#define RK_FUNC_3	3 /* deprecated */
+#define RK_FUNC_4	4 /* deprecated */
 
 #endif