rockchip: spl: Support full-speed CPU in SPL

Add a feature which speeds up the CPU to full speed in SPL to minimise
boot time. This is only supported for certain boards (at present only
jerry).

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/arm/include/asm/arch-rockchip/clock.h b/arch/arm/include/asm/arch-rockchip/clock.h
index a9ea268..d66b26f 100644
--- a/arch/arm/include/asm/arch-rockchip/clock.h
+++ b/arch/arm/include/asm/arch-rockchip/clock.h
@@ -74,4 +74,9 @@
  */
 int rkclk_get_clk(enum rk_clk_id clk_id, struct udevice **devp);
 
+struct rk3288_cru;
+struct rk3288_grf;
+
+void rkclk_configure_cpu(struct rk3288_cru *cru, struct rk3288_grf *grf);
+
 #endif