dt-bindings: crypto: qcom,prng: Add SM8450

SM8450's PRNG does not require a core clock reference. Add a new
compatible with a qcom,prng-ee fallback and handle that.

Signed-off-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>