dt-bindings: net: qcom,ipa: document SM8650 compatible

Document the IPA on the SM8650 Platform which uses version 5.5.1,
which is a minor revision of v5.5 found on SM8550, thus we can
use the SM8550 bindings as fallback since it shares the same
register mappings.

Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20231129-topic-sm8650-upstream-bindings-ipa-v1-1-ca21eb2dfb14@linaro.org


Signed-off-by: Jakub Kicinski <kuba@kernel.org>