dt-bindings: crypto: qcom,prng: Document Hawi TRNG

dt-bindings: crypto: qcom,prng: Document Hawi TRNG

Hawi SoC has the True Random Number Generator (TRNG) which is compatible
with the baseline IP "qcom,trng". Hence, document the compatible as such.

Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@oss.qualcomm.com>
Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>