ARM: dts: msm8974-FP2: Introduce the wcnss remoteproc node

Enable the remoteproc node and add the necessary pinctrl states.

Signed-off-by: Luca Weiss <luca@z3ntu.xyz>
Link: https://lore.kernel.org/r/20191104212302.105469-2-luca@z3ntu.xyz


Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>