Revert "Merge branch 'qcom-dts-updates'"

Revert "Merge branch 'qcom-dts-updates'"

This reverts commit b44947916821f38ae8ffd485cd679040443f5ba9, reversing
these changes made to a473729977d7a127f6b8e7f488ff0cd774eeb6a6:

  commit 1194a6c3441f ("dt-bindings: net: qcom,ipa: make imem interconnect
                       optional")
  commit 0118b7cdd6c5 ("arm64: dts: qcom: sc7280: add IPA information")
  commit 765fa3839c6e ("arm64: dts: qcom: sc7180: define ipa_fw_mem node")

I intend for these commits to go through the Qualcomm repository, to
avoid conflicting with other activity being merged there.

Signed-off-by: Alex Elder <elder@linaro.org>
Link: https://lore.kernel.org/r/20210802233019.800250-1-elder@linaro.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>