Add new i2c-based input mouse driver into input subsystem for Cypress trackpad devices. (issue6626009)

Reviewers: rubini_ipvvis.unipv.it, dmitry.torokhov_gmail.com, linux-input_vger.kernel.org, linux-kernel_vger.kernel.org, olofj_g, Micah C, dudl,

Description:
Add new i2c-based input mouse driver into input subsystem for Cypress trackpad
devices.

Through this new added driver,
Cypress i2c-based trackpad devices will be supported in Linux based system
which are developed based on Cypress self-designed PSOC chipset.
This driver reads trackpad data using i2c interfaces and report cursor
moving data and gesture combined keys to input subsystem.


Change-Id: I108ad1505f3d34ab24658921a772e937940a1b88
Signed-off-by: Du, Dudley <redacted>

BUG=None
TEST=Work fine on ARM tegra2 saeboard and kaen platfrom

Please review this at http://codereview.chromium.org/6626009/

SVN Base: http://git.chromium.org/git/kernel-next.git@chromeos-2.6.37

Affected files:
  M drivers/input/mouse/Kconfig
  M drivers/input/mouse/Makefile
  A drivers/input/mouse/cypress_i2c.c
  A include/linux/cyapa.h