gpio: ge: Convert to use devm_kstrdup

Use devm_kstrdup to simplify the error handling path.
Also return -ENOMEM instead of 0 if devm_kstrdup fails.

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
1 file changed