input: sensors: add Freescale Accelerometer(MMA8X5X) driver.

Support for Freescale (MMA8451/MMA8452/MMA8453/MMA8652/MMA8653).

Change-Id: I505d73b1d6eb3be565f0cbbf1677cfe5c63595d0
Signed-off-by: Yan Zhang <b38342@freescale.com>
Signed-off-by: Wentao Xu <wentaox@codeaurora.org>
Git-commit: 65c115e988b26c694ece73edbb061dbd7f28ae0d
Git-repo: https://github.com/FSLSensors/sensors-linux-drv


[lix@codeaurora.org: Solve merging conflicts and compiling issue.]
Signed-off-by: Xiaocheng Li <lix@codeaurora.org>