pinctrl: abx500: rework error path
pinctrl: abx500: rework error path

At several places, return value was not tested
and error output was missing.

Signed-off-by: Patrice Chotard <d719ec623d33f81f80f0590564803dead94a5492@st.com>
Signed-off-by: Linus Walleij <9cd9d802d23c0ed5e224beabf4ae4a5c478746ef@linaro.org>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs