All flash controllers have a mandatory compatible property.
Add it to the generic binding that is included by all.
Signed-off-by: Bobby Noelte <b0661n0e17e@gmail.com>
Convert NXP k6x and kw2xd flash driver to use device tree to get the
flash controller name from device tree. We introduce yaml bindings for
the "nxp,kinetis-ftfe" and "nxp,kinetis-ftfl" devices.
Fixes: #5788
Signed-off-by: Kumar Gala <kumar.gala@linaro.org>