arm64: dts: qcom: msm8916: Move aliases to boards

MSM8939 has the aliases defined separately for each board (because
there could be (theoretically) a board where the slots are numbered
differently. To make MSM8916 and MSM8939 more consistent do the same
for all MSM8916 boards and move aliases there.

Signed-off-by: Stephan Gerhold <stephan@gerhold.net>
Reviewed-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20230525-msm8916-labels-v1-6-bec0f5fb46fb@gerhold.net