Try to fix the LSM303D accel init
Corrected a wrong register adress (which is unused)
Just indentation fixes
Reset (reconfigure) the LSM303D when it stopped after e.g. a short
lsm303d: changed _device_errors to a perf counter

makes it easier to see how many resets we are getting
lsm303d: added 'lsm303d regdump' command

useful for diagnosing issues
lsm303d: fixed handling of _reg1_needed
lsm303d: use PACKED attribute

also send zeros in sensor transfer
lsm303d: define some more register addresses
lsm303d: print more registers in "lsm303d regdump"
lsm303d: differentiate more types of errors

useful for diagnosis while chasing bugs
px4fmu2: disable sensor rail power toggle on startup

this causes the lsm303d to get into a very bad state