customer: support for external driver kconfig [1/3]

PD#SWPL-132650

Problem:
support for external driver kconfig

Solution:
support for external driver kconfig

Verify:
ohm planck

Change-Id: Ib7180059b02ee7c4d8984201bfe192d961680bad
Signed-off-by: Wanwei Jiang <wanwei.jiang@amlogic.com>
diff --git a/amlogic_utils.sh b/amlogic_utils.sh
index b2690e5..39bde58 100644
--- a/amlogic_utils.sh
+++ b/amlogic_utils.sh
@@ -1991,6 +1991,8 @@
 
 	tool_args+=("LOADADDR=0x108000")
 	tool_args+=("DEPMOD=depmod")
+	tool_args+=("KCONFIG_EXT_MODULES_PREFIX=${KCONFIG_EXT_MODULES_PREFIX}")
+	tool_args+=("KCONFIG_EXT_PREFIX=${KCONFIG_EXT_PREFIX}")
 	TOOL_ARGS="${tool_args[@]}"
 
 	mkdir -p ${OUT_DIR}