dt-bindings: mfd: qcom,tcsr: Document support for SA8255p

Add compatible for tcsr representing support on SA8255p SoC.

Signed-off-by: Shazad Hussain <quic_shazhuss@quicinc.com>
Signed-off-by: Nikunj Kela <quic_nkela@quicinc.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20240905194741.3803345-1-quic_nkela@quicinc.com


Signed-off-by: Lee Jones <lee@kernel.org>