ARM: dts: n900: rename accelerometer node

Use generic node naming for lis302dl accelerometer, and drop its
label that is not used anywhere else.

Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Sicelo A. Mhlongo <absicsz@gmail.com>
Message-Id: <20221229171348.3543327-2-absicsz@gmail.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>