clk: rockchip: rk3288 export i2s0_clkout for use in DT

This exposes the clock that comes out of the i2s block which generally
goes to the audio codec.

Signed-off-by: Sonny Rao <sonnyrao@chromium.org>
[removed CLK_SET_RATE_PARENT from original patch]
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
diff --git a/include/dt-bindings/clock/rk3288-cru.h b/include/dt-bindings/clock/rk3288-cru.h
index 8e19ed5..edf0110 100644
--- a/include/dt-bindings/clock/rk3288-cru.h
+++ b/include/dt-bindings/clock/rk3288-cru.h
@@ -71,6 +71,7 @@
 #define SCLK_HDMI_CEC		110
 #define SCLK_HEVC_CABAC		111
 #define SCLK_HEVC_CORE		112
+#define SCLK_I2S0_OUT		113
 
 #define DCLK_VOP0		190
 #define DCLK_VOP1		191