Revert "drivers: sensor: Add support for MMA8451Q (3-axis accelerometer)"

Driver fxos8700 can also be used for the MMA8451
accelerometer and offers more functionality.
Revert the commit to avoid duplicate code.

This reverts commit 9c0d7813e55e323f6c2613faef0d6772fb016196.

Signed-off-by: Johann Fischer <j.fischer@phytec.de>
7 files changed