linux-yocto 3.10 bbappend: try to be less anti-social

Make this BSP safer to include along other layers.

Signed-off-by: Koen Kooi <koen@dominion.thruhere.net>
linux-edison: replace linux-yocto with linux-edison

The linux-yocto bbappend seemed to remove everything that linux-yocto
adds over a simple recipe, so don't bother with appending and just use a
simple kernel recipe.

Maybe leveraging linux-yocto custom is a better idea, but I lack the
time to look into that.

Signed-off-by: Koen Kooi <koen@dominion.thruhere.net>
edison: switch to linux-edison

Signed-off-by: Koen Kooi <koen@dominion.thruhere.net>
linux-edison: fix FILESEXTRAPATHS

Signed-off-by: Koen Kooi <koen@dominion.thruhere.net>
linux-edison: change defconfig to 'savedefconfig' style format

Signed-off-by: Koen Kooi <koen@dominion.thruhere.net>