ARM: dts: qcom: pm8226: Add vibration motor node

Add a node for pm8226's vibration motor driver.
Keep it disabled by default, some devices don't make use of it.

Signed-off-by: Jack Matthews <jm5112356@gmail.com>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20211123003256.2467776-1-jm5112356@gmail.com