To prepare to upcoming dtc v1.4.6, fix warnings in dts files.
This commit addresses the following warning:
"unnecessary #address-cells/#size-cells without "ranges" or child
"reg" property in /gpio_keys".
Signed-off-by: Erwan Gouriou <erwan.gouriou@linaro.org>
Add initial support for NUCLEO-L073RZ board.
This is a typical Nucleo-64 board, so most files are reused
from already supported Nucleo boards with small changes.
Signed-off-by: Ilya Tagunov <tagunil@gmail.com>