[Feature][ZXW-237]merge 4Gb DDR patch

Only Configure: No
Affected branch: master
Affected module: unknow
Is it affected on both ZXIC and MTK: only ZXIC
Self-test: Yes
Doc Update: No

Change-Id: Ic1d54476f67c48ed9033043c248b6ae7ae76515e
diff --git a/boot/common/src/loader/drivers/efuse.c b/boot/common/src/loader/drivers/efuse.c
index 2b2cc08..ae3ebd3 100755
--- a/boot/common/src/loader/drivers/efuse.c
+++ b/boot/common/src/loader/drivers/efuse.c
@@ -53,6 +53,11 @@
 	{
 		ddr_flag = CHIP_DDR_256M;
 	}
+	else if(((psEfuseInfo->secure_flag >> 8) == ZX297520V3ECOSCC_GW_NYB_4G_DDR)
+		||((psEfuseInfo->secure_flag >> 8) == ZX297520V3ECOGG_GW_NYB_4G_DDR))
+	{
+		ddr_flag = CHIP_DDR_512M;
+	}	
 	else
 	{
 		ddr_flag = CHIP_DDR_128M;