arm64: dts: qcom: ipq8074: add PRNG node

PRNG insinde of IPQ8074 is already supported,
so simply add the node for it.

Signed-off-by: Robert Marko <robimarko@gmail.com>
Link: https://lore.kernel.org/r/20210518181618.3238386-2-robimarko@gmail.com


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