regulator: tps65219: use generic set_bypass()

regulator: tps65219: use generic set_bypass()

Due to wrong interpretation of the specification,
custom implementation was used instead of standard regmap helper.
LINK: https://lore.kernel.org/all/c2014039-f1e8-6976-33d6-52e2dd4e7b66@baylibre.com/
Fixes: c12ac5fc3e0a ("regulator: drivers: Add TI TPS65219 PMIC regulators support")
Regulator does NOT require to be off to be switched to bypass mode.

Signed-off-by: Jerome Neanne <jneanne@baylibre.com>
Link: https://lore.kernel.org/r/20230203140119.13029-1-jneanne@baylibre.com
Signed-off-by: Mark Brown <broonie@kernel.org>