arm64: dts: qcom: sa8775p-ride: enable i2c18

This enables the I2C interface on the sa8775p-ride development board.

Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20230309103752.173541-5-brgl@bgdev.pl