arm64: dts: qcom: qcs404: Add wifi rails in QCS404 dt node for proxy votes

Add wifi regulators in qcs404 dt node for proxy vote. Proxy votes are
required for handling driver recovery scenarios to prevent
un-clocked register access during driver recovery.

Signed-off-by: Govind Singh <govinds@codeaurora.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>