regulator: mcp16502: Convert to use .probe_new

Use the new .probe_new for mcp16502.

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Link: https://lore.kernel.org/r/20210526125026.82549-1-axel.lin@ingics.com


Signed-off-by: Mark Brown <broonie@kernel.org>