REGMAP_I2C is not a visible config option.
Thus make PWM_PCA9685 depend on I2c and then select REGMAP_I2C.
Signed-off-by: NAxel Lin <axel.lin@ingics.com>
Acked-by: NSteffen Trumtrar <s.trumtrar@pengutronix.de>
Signed-off-by: NThierry Reding <thierry.reding@gmail.com>