RNG hardware in QCS404 features (Execution Environment) EE for
HLOS to use, add the node for prng-ee for QCS404.
Reviewed-by: NBjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: NVinod Koul <vkoul@kernel.org>
Signed-off-by: NAndy Gross <andy.gross@linaro.org>