[usb-moded] Only have one modem port in diag mode

Fixes: JB#10461

Signed-off-by: Philippe De Swert <philippe.deswert@jollamobile.com>

config/dyn-modes/diag_mode.ini

@@ -15,5 +15,5 @@ softconnect_disconnect = 0
 android_extra_sysfs_path = /sys/class/android_usb/android0/f_diag/clients
 android_extra_sysfs_value = diag
 android_extra_sysfs_path2 = /sys/class/android_usb/android0/f_serial/transports
-android_extra_sysfs_value2 = smd,tty
+android_extra_sysfs_value2 = smd
 idProduct = 0A04