dt-bindings: net: qcom,ipa: add support for MSM8998

Add support for "qcom,msm8998-ipa", which uses IPA v3.1.

Originally proposed by AngeloGioacchino Del Regno.

Link: https://lore.kernel.org/linux-arm-msm/20210211175015.200772-8-angelogioacchino.delregno@somainline.org


Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>