input: cyttsp-i2c: Support fw update based on version

Currently, firmware will not upgrade to a version which doesn't
have the same major number as what is already on the device.
This change will allow the upgrade to happen when the new
firmware matches the version listed in platform data, regardless
of what version is currently on the device.

Change-Id: Ifd1733aab2866ed3fce60a462d1699d2c5cb39b4
Signed-off-by: Amy Maloche <amaloche@codeaurora.org>