Add Maxim MAX77696 driver

Add Maxim MAX77696 driver as provided by Maxim Integrated

Signed-off-by: Diego Rondini <diego.rondini@kynetics.it>
Add Freescale FXOS8700 driver

Add driver for Freescale FXOS8700 6-Axis Acc and Mag Combo Sensor, as
provided by Freescale Semiconductor

Signed-off-by: Diego Rondini <diego.rondini@kynetics.it>
Merge branch 'warp/drivers-integration/jb4.3_1.1.0-ga' into warp/jb4.3_1.1.0-ga_initial
Activate MAX77696 PMIC and FXOS in warp defconfig

Activate MAX77696 PMIC and FXOS accelerometer and magnetometer in WaRP defconfig

Signed-off-by: Diego Rondini <diego.rondini@kynetics.it>