The probe() function returns an uninitialized variable in the success
path.  There is no need for the "err" variable at all, just delete it.

Fixes: b014e9fa ("regulator: Support ROHM BD9576MUF and BD9573MUF")
Signed-off-by: NDan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: NMatti Vaittinen <matti.vaittinen@fi.rohmeurope.com>
Link: https://lore.kernel.org/r/YEsbfLJfEWtnRpoU@mwandaSigned-off-by: NMark Brown <broonie@kernel.org>