rockchip: sdram: move cap structure and debug function to sdram_common.h

The sdram.h suppose to be helper file for sdram.c which including dram
size decode and some u-boot related dram init interface, and all
structure and function for dram driver move to sdram_common.h

Signed-off-by: YouMin Chen <cym@rock-chips.com>
Signed-off-by: Kever Yang <kever.yang@rock-chips.com>
diff --git a/arch/arm/include/asm/arch-rockchip/sdram_rk3328.h b/arch/arm/include/asm/arch-rockchip/sdram_rk3328.h
index 11411ea..c747b46 100644
--- a/arch/arm/include/asm/arch-rockchip/sdram_rk3328.h
+++ b/arch/arm/include/asm/arch-rockchip/sdram_rk3328.h
@@ -6,6 +6,7 @@
 
 #ifndef _ASM_ARCH_SDRAM_RK3328_H
 #define _ASM_ARCH_SDRAM_RK3328_H
+#include <asm/arch-rockchip/sdram_common.h>
 
 #define SR_IDLE		93
 #define PD_IDLE		13