arm64: dts: qcom: sm8250: Add support for PRNG EE

RNG (Random Number Generator) in SM8250 features PRNG EE (Execution
Environment), hence add devicetree support for it.

Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://lore.kernel.org/r/20200921065806.10928-1-manivannan.sadhasivam@linaro.org


Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>