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arm64: dts: qcom: pmk[345]50: enable reboot reason

Like SA8775P (at [1]), the SM8350, SM8450 & SM8550 platforms uses
the SDAM2 nvmem to pass the reboot reason.

This simply adds the sdam2 and reboot reason nodes
in the pmk8350 and pmk8550 dtsi.

Tested with:

and

triggering the following ABL logs on HDK8450:
  KeyPress:0, BootReason:2
  Fastboot=1, Recovery:0
and
  KeyPress:0, BootReason:1
  Fastboot=0, Recovery:1

[1] https://lore.kernel.org/lkml/20230417145536.414490-1-brgl@bgdev.pl/T/

To: Andy Gross <agross@kernel.org>
To: Bjorn Andersson <andersson@kernel.org>
To: Konrad Dybcio <konrad.dybcio@linaro.org>
To: Rob Herring <robh+dt@kernel.org>
To: Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>
Cc: Abel Vesa <abel.vesa@linaro.org>
Cc: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Cc: linux-arm-msm@vger.kernel.org
Cc: devicetree@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>

---
Neil Armstrong (2):
      arm64: dts: qcom: pmk8350: add reboot-mode node using sdam_2 nvmem
      arm64: dts: qcom: pmk8550: add reboot-mode node using sdam_2 nvmem

 arch/arm64/boot/dts/qcom/pmk8350.dtsi | 23 +++++++++++++++++++++++
 arch/arm64/boot/dts/qcom/pmk8550.dtsi | 23 +++++++++++++++++++++++
 2 files changed, 46 insertions(+)
---
base-commit: 92e815cf07ed24ee1c51b122f24ffcf2964b4b13
change-id: 20230503-topic-sm8450-upstream-reboot-reason-e5fc827bac27

Best regards,