arm64: dts: qcom: sm6115: Add missing MDSS core reset

arm64: dts: qcom: sm6115: Add missing MDSS core reset

To make sure the display subsystem starts in a predictable state, we
need to reset it. Otherwise, unpredictable issues can happen, e.g.
on the motorola-guamp smartphone DSI would not transmit anything.

Wire up the reset to fix.

Fixes: 705e50427d81 ("arm64: dts: qcom: sm6115: Add mdss/dpu node")
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Signed-off-by: Val Packett <val@packett.cool>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Link: https://lore.kernel.org/r/20260303034847.13870-6-val@packett.cool
Signed-off-by: Bjorn Andersson <andersson@kernel.org>