input: synaptics_i2c_rmi4: Add regulator support

Add support for regulators to be controlled from driver
side.  This includes configuration and enablement.

Change-Id: I899dec377c4b766749d3f70b80a51f3c21757911
Signed-off-by: Amy Maloche <amaloche@codeaurora.org>
Signed-off-by: Shantanu Jain <shjain@codeaurora.org>
3 files changed