msm8916.dtsi sets the iris compatible to "qcom,wcn3620".
While WCN3620 seems to be used on most MSM8916 devices,
MSM8916 can also be paired with another chip (e.g. for WiFi dual-band).

A5U uses WCN3660B instead, so the compatible needs to be overridden
to apply the correct configuration.

However, simply using "qcom,wcn3660" would be incorrect,
since WCN3660B requires a slightly different regulator configuration
compared to WCN3660.

Instead, it requires the same configuration as "qcom,wcn3680".
Replace the compatible with "qcom,wcn3680" for A5U to make WCNSS
work correctly.
Signed-off-by: Stephan Gerhold <stephan@gerhold.net>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>