arm64: dts: qcom: msm8953: Adjust reserved-memory nodes

Adjust node names so they're not just memory@ but actually show what
they're used for. Also add labels to most nodes so we can easily
reference them from devices.

Signed-off-by: Luca Weiss <luca@z3ntu.xyz>
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20221207-msm8953-6-1-next-dtbs-v3-v3-2-a64b3b0af0eb@z3ntu.xyz