dt-bindings: arm: qcom: Adjust LTE SKUs for sc7280-villager

dt-bindings: arm: qcom: Adjust LTE SKUs for sc7280-villager

There have been a few changes since the patch ("dt-bindings: arm:
qcom: document sc7280 and villager board").
* New firmware reports LTE boards as "SKU 512" now. Old firmware will
  still report "SKU 0", but that's all pre-production and everyone
  will update.
* It's been relaized that no "-rev0" boards were ever built that were
  WiFi-only. Thus we don't two entries for -rev0.

Signed-off-by: Douglas Anderson <dianders@chromium.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20220829084732.1.I9ef7f8b909a7afbef9ff2251a98c67033f37b516@changeid