[ofw] [PATCH 0/3] minor cleanups to winof

[Sean Hefty]

The following 3 patches make it a little easier to automatically
build the winof stack, plus add some minor code cleanups.

It also looks like there may be a lot of dead code in the tree.  Are
the mt23108 driver and related vapi code safe to remove?  (There's
over 300 files under hw/mt23108 taking up 11 MB of disk space...)

Signed-off-by: Sean Hefty <sean.hefty at intel.com>