[OE-core] [RFC] wpa-supplicant - enable CONFIG_CTRL_IFACE_DBUS_NEW in config

[Steve Sakoman]

I've begun using Yocto 1.5 (dora) for several client projects over the
past few weeks.

I noticed that images that included connman and wpa-supplicant always
failed to enable the wifi technology properly.  The visible error
indication in the log:

src/technology.c:technology_get() No matching drivers found for wifi

After many hours of debugging I finally figured out that this was due
to a missing option in wpa-supplicant (CONFIG_CTRL_IFACE_DBUS_NEW)

Adding a bbappend for wpa-supplicant with this option enabled fixed
the issue and connman now handles wifi interfaces as expected.

Was there a particular reason CONFIG_CTRL_IFACE_DBUS_NEW wasn't enabled?

Steve