regulator: pca9450: Convert to use regulator_set_ramp_delay_regmap

[ Upstream commit 4c4fce17 ]

Use regulator_set_ramp_delay_regmap instead of open-coded.

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Link: https://lore.kernel.org/r/20210526122408.78156-1-axel.lin@ingics.com


Signed-off-by: Mark Brown <broonie@kernel.org>
Stable-dep-of: d67dada3 ("regulator: pca9450: Fix BUCK2 enable_mask")
Signed-off-by: Sasha Levin <sashal@kernel.org>