linux.inc: drop devicetree settings
linux.inc: drop devicetree settings

Device tree names should go to machine conf files, not to kernel recipe
or linux.inc. Also for now they are unused, as none of this machines
is supported by meta-hh/linux.inc. Drop them accordingly.

Signed-off-by: Dmitry Eremin-Solenikov <b6edad08270b2e4ffbcb0879e25a0e29a48c5275@gmail.com>
Signed-off-by: Paul Eggleton <737d4dae46a541673d7bf4e0d5b32714b16528d8@linux.intel.com>

bluelightning/meta-handheld,bluelightning/meta-handheld