mfd: max77686: Make error checking consistent

Error checking across the driver is mostly consistent besides
a few exceptions, so change these exceptions for consistency.

Signed-off-by: Javier Martinez Canillas <javier.martinez@collabora.co.uk>
Reviewed-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
1 file changed