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>
ArgonKey board is a 96boards sensor hub platform for all 96Boards
compliant family products. The ArgonKey packs a Cortex-M4 chip
together with a set of motion, environmental and ambiental sensors
and can be used as a development platform for many different
applications.
Signed-off-by: Armando Visconti <armando.visconti@st.com>