ARM: dts: qcom: msm8974-hammerhead: Update model property

ARM: dts: qcom: msm8974-hammerhead: Update model property

Many years have passed (more than 9 actually) since the introduction of
the Nexus 5 dts to Linux and it's high time to update the model property
to be a proper model name and thereby bringing it to the standards of
the 2020s.

Signed-off-by: Luca Weiss <luca@lucaweiss.eu>
Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Reviewed-by: David Heidelberg <david@ixit.cz>
Link: https://lore.kernel.org/r/20251208-msm8974-hammerhead-model-v1-1-88975f30cbaa@lucaweiss.eu
Signed-off-by: Bjorn Andersson <andersson@kernel.org>