[Feature][ZXW-241]merge P56U01 version

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: I7985538dde6951dd824c36149bf9a1e3ca23c734
diff --git a/ap/app/Script/scripts/psext_up.sh b/ap/app/Script/scripts/psext_up.sh
index c67e4fe..580ce71 100755
--- a/ap/app/Script/scripts/psext_up.sh
+++ b/ap/app/Script/scripts/psext_up.sh
@@ -88,8 +88,11 @@
 	fi
 }
 
-mtu=`nv get mtu`
-ifconfig $ps_if mtu $mtu
+ra_mtu_enable=`nv get ra_mtu_enable`
+if [ "$ra_mtu_enable" != "1" ]; then
+	mtu=`nv get mtu`
+	ifconfig $ps_if mtu $mtu
+fi
 brctl addbr $ext_br
 brctl setfd $ext_br 0.1
 brctl addif $ext_br $eth_if