arm64: dts: qcom: sc7180: Add missing properties for Wifi node

arm64: dts: qcom: sc7180: Add missing properties for Wifi node

The wlan firmware memory is statically mapped in
the Trusted Firmware, hence the wlan driver does
not need to map/unmap this region dynamically.

Hence add the property to indicate the wlan driver
to not map/unamp the firmware memory region
dynamically.

Also add the chain1 voltage supply for wlan.

Reviewed-by: Douglas Anderson <dianders@chromium.org>
Signed-off-by: Rakesh Pillai <pillair@codeaurora.org>
Link: https://lore.kernel.org/r/1594615586-17055-1-git-send-email-pillair@codeaurora.org
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>