[PATCH v3 0/1] Input: add driver for Cypress APA I2C Trackpad

Thanks Dmitry, Jean, and Henrik.

Here's V3, which I have confirms compiles on input-next, and works
well on my Chromebook.

v3 : * Handle pointer emulation and unused slots in core
     * Fix compile fail on 3.7 for input_mt_init_slots (Thanks Rydberg)
     * Set BUTTONPAD property only if is a buttonpad based on capabilities.
     * Removed __devinit/__devexit/__devexit_p
     * Set to OFF power mode on cyapa_remove
     * Got rid of kasprintf'd physical location string for static one.