Fix below warning when CONFIG_OF=n:

drivers/regulator/88pg86x.c:87:34: warning: ‘pg86x_dt_ids’ defined but not used [-Wunused-const-variable=]
87 | static const struct of_device_id pg86x_dt_ids [] = {
   |                                  ^~~~~~~~~~~~

Signed-off-by: Jisheng Zhang <Jisheng.Zhang@synaptics.com>
Link: https://lore.kernel.org/r/20200821111210.0a0bed94@xhacker.debian
Signed-off-by: Mark Brown <broonie@kernel.org>

Change the regulator helpers to use common linear_ranges code.

Signed-off-by: Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>
Reviewed-by: Mark Brown <broonie@kernel.org>
Acked-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Acked-by: Adam Thomson <Adam.Thomson.Opensource@diasemi.com>
Link: https://lore.kernel.org/r/64f01d5e381b8631a271616b7790f9d5640974fb.1588944082.git.matti.vaittinen@fi.rohmeurope.com
Signed-off-by: Mark Brown <broonie@kernel.org>

This chip is found on Google Chromecast and Valve Steam Link devices.
It provides two DC regulators with I2C voltage control, separate GPIO
enable pins and one sleep mode pin.

This driver does not expose GPIO functionality, but supports voltage
control in 1.0-2.2V range, based on I2C register information given in
Chromecast kernel driver by Jisheng Zhang.

Cc: Jisheng Zhang <Jisheng.Zhang@synaptics.com>
Signed-off-by: Alexander Monakov <amonakov@ispras.ru>
Signed-off-by: Mark Brown <broonie@kernel.org>