[linux-yocto] [PATCH] meta: add features/iwlegacy

[Ross Burton]

Hi,

This is my first linux-yocto meta/ patch, and the first time I've looked at a
kernel configuration for many years, so a good dose of review is appreciated!

The current meta/ tree has iwlagn and iwlwifi, but those don't mean what they
think anymore: the new modules are iwlwifi (modern devices) and iwlegacy
(3945/4965 only).  This patch adds a iwlegacy feature to be used instead of
iwlagn on recent kernels.

Ross