input: pat9125: add support of sending rotating switch events

Add support of reading the status of the device, parsing it and
sending it to the Input framework using the input APIs.

Change-Id: Iebc3767e9dbcf10a541b8b02f8696da84312447a
Signed-off-by: Vevek Venkatesan <vevekv@codeaurora.org>
Signed-off-by: Shantanu Jain <shjain@codeaurora.org>