dtb: support multiple dtb files [2/2]

PD#SWPL-93925

Problem:
support multiple dtb files

Solution:
support multiple dtb files

Verify:
s4d

Change-Id: I45ff3a67605e472fa40e7c8e29753e2da5f3db51
Signed-off-by: Wanwei Jiang <wanwei.jiang@amlogic.com>
diff --git a/amlogic_utils.sh b/amlogic_utils.sh
index 4aac281..b8e8e22 100644
--- a/amlogic_utils.sh
+++ b/amlogic_utils.sh
@@ -212,6 +212,7 @@
 
 	if [[ -f ${KERNEL_BUILD_VAR_FILE} ]]; then
 		: > ${KERNEL_BUILD_VAR_FILE}
+		echo "KERNEL_DIR=${KERNEL_DIR}" >>  ${KERNEL_BUILD_VAR_FILE}
 		echo "COMMON_OUT_DIR=${COMMON_OUT_DIR}" >>  ${KERNEL_BUILD_VAR_FILE}
 		echo "OUT_DIR=${OUT_DIR}" >> ${KERNEL_BUILD_VAR_FILE}
 		echo "DIST_DIR=${DIST_DIR}" >> ${KERNEL_BUILD_VAR_FILE}
@@ -222,7 +223,6 @@
 		echo "SYSTEM_DLKM_STAGING_DIR=${SYSTEM_DLKM_STAGING_DIR}" >> ${KERNEL_BUILD_VAR_FILE}
 		echo "VENDOR_DLKM_STAGING_DIR=${VENDOR_DLKM_STAGING_DIR}" >> ${KERNEL_BUILD_VAR_FILE}
 		echo "MKBOOTIMG_STAGING_DIR=${MKBOOTIMG_STAGING_DIR}" >> ${KERNEL_BUILD_VAR_FILE}
-		echo "KERNEL_DEVICETREE=${KERNEL_DEVICETREE}" >> ${KERNEL_BUILD_VAR_FILE}
 	fi
 }