arm64: dts: qcom: c630: Add Embedded Controller node

The Embedded Controller in the Lenovo Yoga C630 is accessible on &i2c1
and provides battery and adapter status, as well as altmode
notifications for the second USB Type-C port.

Add a definition for the EC.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Link: https://lore.kernel.org/r/20240614-yoga-ec-driver-v7-6-9f0b9b40ae76@linaro.org


Signed-off-by: Bjorn Andersson <andersson@kernel.org>