dt-bindings: net: wireless: qcom,ath11k: describe the ath11k on QCA6390

Add a PCI compatible for the ATH11K module on QCA6390 and describe the
power inputs from the PMU that it consumes.

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Signed-off-by: Kalle Valo <quic_kvalo@quicinc.com>
Link: https://msgid.link/20240605122106.23818-2-brgl@bgdev.pl