conf: Allow wandboards to boot a mainline kernel

Pass KERNEL_DEVICETREE, so that wandboard variants could boot a mainline kernel.

The solo variant uses the same dtb from the dual-lite, as they are the same
SoC with only the number of cores being different.

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
linux-boundary (3.0.35): update to match Freescale's 4.1.1 release

Signed-off-by: Eric Nelson <eric.nelson@boundarydevices.com>
barebox: add cfa10036 to COMPATIBLE_MACHINE

Signed-off-by: Eric Bénard <eric@eukrea.com>