arm64: dts: qcom: ipq9574: Enable the download mode support

Enable the support for download mode to collect the crashdumps if
system crashes, to debug crashes extensively.

Signed-off-by: Poovendhan Selvaraj <quic_poovendh@quicinc.com>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20230511075814.2370-2-quic_poovendh@quicinc.com