[][openwrt-24][common][config][Fix unified autobuild flow]

[Description]
Change prereq to prepare-tmpinfo to avoid triggering menuconfig

[Release-log]
N/A

Change-Id: I8f5104f2edd1a6620e0ca56d9a9ba5df76126dba
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/9695636
diff --git a/autobuild/unified/rules b/autobuild/unified/rules
index 8dbff95..9de8849 100755
--- a/autobuild/unified/rules
+++ b/autobuild/unified/rules
@@ -298,7 +298,7 @@
 prepare_openwrt_config() {
 	local kconfig_files=
 
-	exec_log "make -C \"${openwrt_root}\" prereq scripts/config/aconf"
+	exec_log "make -C \"${openwrt_root}\" prepare-tmpinfo scripts/config/aconf"
 
 	openwrt_config_file="${openwrt_root}/.config"