arm: ls102xa: clear EPU registers for deep sleep

After wakeup from deep sleep, Clear EPU registers as early as possible
to prevent from possible issue. It's also safe to clear at normal boot.

Signed-off-by: Chenhui Zhao <chenhui.zhao@freescale.com>
Reviewed-by: York Sun <yorksun@freescale.com>
diff --git a/arch/arm/include/asm/arch-ls102xa/config.h b/arch/arm/include/asm/arch-ls102xa/config.h
index ba86eea..7d70c7b 100644
--- a/arch/arm/include/asm/arch-ls102xa/config.h
+++ b/arch/arm/include/asm/arch-ls102xa/config.h
@@ -13,6 +13,7 @@
 #define OCRAM_SIZE				0x00020000
 
 #define CONFIG_SYS_IMMR				0x01000000
+#define CONFIG_SYS_DCSRBAR			0x20000000
 
 #define CONFIG_SYS_FSL_DDR_ADDR			(CONFIG_SYS_IMMR + 0x00080000)
 #define CONFIG_SYS_CCI400_ADDR			(CONFIG_SYS_IMMR + 0x00180000)