ARM: dts: qcom: msm8660: Add GSBI3 I2C bus

GSBI3 can be used to enable an external I2C bus on e.g. the
APQ8060. On the DragonBoard APQ8060 this I2C bus is used to
talk to the Cypress CY8CTMA340 CYTTSP touchscreen.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20220913132846.305716-2-linus.walleij@linaro.org