ar71xx-generic and -tiny benefit most from the optimized kernel, as they
contain all devices with 32MB RAM. We enable CONFIG_GLUON_SPECIALIZE_KERNEL
for all targets using the mips24_kc architecture so packages shared between
targets don't need to be rebuild all the time.

adding an alias as it uses the same image as the TL-WR940N v4

marked as BROKEN for now as it is untested

It seems the device was lost during the OpenWrt -> LEDE migration.

Fixes #1126

The TL-WR940N doesn't have detachable antennas. Make v1-v3 match v4.

To fix the autoupdater.