power: supply: ucs1002: Fix wrong return value checking

Fix wrong return value checking for devm_regulator_register and
devm_regmap_init_i2c. This looks like a copy-n-paste mistake.

Fixes: 9a2688e4 ("power: supply: Add driver for Microchip UCS1002")
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Reviewed-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
Reviewed-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>