rockchip: rk3188: add rk_board_late_init() hook

All other rockchip boards have rk_board_late_init() hook,
so add it to rk3188 boards also.

Signed-off-by: Alexander Kochetkov <al.kochet@gmail.com>
Acked-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
Reviewed-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
diff --git a/arch/arm/mach-rockchip/rk3188-board.c b/arch/arm/mach-rockchip/rk3188-board.c
index 0aaa959..8853e4a 100644
--- a/arch/arm/mach-rockchip/rk3188-board.c
+++ b/arch/arm/mach-rockchip/rk3188-board.c
@@ -17,6 +17,11 @@
 #include <asm/gpio.h>
 #include <dm/pinctrl.h>
 
+__weak int rk_board_late_init(void)
+{
+	return 0;
+}
+
 int board_late_init(void)
 {
 	struct rk3188_grf *grf;
@@ -32,7 +37,7 @@
 			NOC_REMAP_MASK << NOC_REMAP_SHIFT);
 	}
 
-	return 0;
+	return rk_board_late_init();
 }
 
 int board_init(void)