ARM: dts: qcom: fix i2c lables to be inline with others

This patch fixes i2c lables to be inline with serial labels.
The reason to do this is that it would look odd if we add aliases in the
board file along with serial.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Andy Gross <andy.gross@linaro.org>