wembley: more correct sysfs_net labelling

The test only checks .../mtu because it's lazy.
But it's the entire network directory tree which should be labelled sysfs_net.

You can see other examples for other devices
with cs/ for "p:android genfscon.*sysfs_net"
these all end the path with /net

(vs "p:android genfscon.*/mtu.*sysfs_net" which only finds wembley)

Test: TreeHugger
Signed-off-by: Maciej Żenczykowski <maze@google.com>
Change-Id: Icb2f340127781e11d14b725bf37294c35749f0ca
diff --git a/non_plat/genfs_contexts b/non_plat/genfs_contexts
index f0b0e56..b627077 100644
--- a/non_plat/genfs_contexts
+++ b/non_plat/genfs_contexts
@@ -356,18 +356,10 @@
 # Date : WK20.25
 # Operation: R migration
 # Purpose : for VTS NetdSELinuxTest.CheckProperMTULabels requirement.
-genfscon sysfs /devices/platform/18000000.wifi/net/wlan0/mtu u:object_r:sysfs_net:s0
-genfscon sysfs /devices/platform/18000000.wifi/net/wlan1/mtu u:object_r:sysfs_net:s0
-genfscon sysfs /devices/platform/soc/18000000.wifi/net/wlan0/mtu u:object_r:sysfs_net:s0
-genfscon sysfs /devices/platform/soc/18000000.wifi/net/wlan1/mtu u:object_r:sysfs_net:s0
-genfscon sysfs /devices/platform/180f0000.wifi/net/wlan0/mtu u:object_r:sysfs_net:s0
-genfscon sysfs /devices/platform/180f0000.wifi/net/wlan1/mtu u:object_r:sysfs_net:s0
-genfscon sysfs /devices/platform/180f0000.wifi/net/p2p0/mtu u:object_r:sysfs_net:s0
-genfscon sysfs /devices/platform/180f0000.wifi/net/p2p1/mtu u:object_r:sysfs_net:s0
-genfscon sysfs /devices/platform/bus/180f0000.WIFI/net/wlan0/mtu u:object_r:sysfs_net:s0
-genfscon sysfs /devices/platform/bus/180f0000.WIFI/net/wlan1/mtu u:object_r:sysfs_net:s0
-genfscon sysfs /devices/platform/bus/180f0000.WIFI/net/p2p0/mtu u:object_r:sysfs_net:s0
-genfscon sysfs /devices/platform/bus/180f0000.WIFI/net/p2p1/mtu u:object_r:sysfs_net:s0
+genfscon sysfs /devices/platform/18000000.wifi/net u:object_r:sysfs_net:s0
+genfscon sysfs /devices/platform/soc/18000000.wifi/net u:object_r:sysfs_net:s0
+genfscon sysfs /devices/platform/180f0000.wifi/net u:object_r:sysfs_net:s0
+genfscon sysfs /devices/platform/bus/180f0000.WIFI/net u:object_r:sysfs_net:s0
 
 # 2020/06/29
 # Operation: R migration