A pointer to "pdev->dev" is already stored in "dev", so use it in
devm_kzalloc.
Signed-off-by: NTobias Klauser <tklauser@distanz.ch>
Acked-by: NKevin Hilman <khilman@ti.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>