I2C: Remove set_address() API function.

sc_i2c_set_address() was added for extra functionality that is
actually done in a different way, so removing the unneeded API call.
lsm9ds0: WIP: Something actually moving.

Use the auto increment properly.
Set lsm9ds0 address in a correct way.
DRDY_G signal not working, so workarounding it by using magnetometer
data ready signal also for gyroscope to unblock testing.