arm64: dts: qcom: qrb5165-rb5: Add onboard LED support

Only User4, WLAN and BT LEDs are added for now. These GPIOs are coming
from PM8150. Rest are coming from LPG block which is not supported yet!

Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://lore.kernel.org/r/20200904063637.28632-5-manivannan.sadhasivam@linaro.org
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
