arm64: dts: msm8916-samsung-a2015: Enable WCNSS for WiFi and BT

WCNSS is used on A3U and A5U for WiFi and BT,
and seems to work fine without further changes.

Enable it in the common include.

Signed-off-by: Stephan Gerhold <stephan@gerhold.net>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>