pinctrl: qcom: fix up errorpath

This fixes up:
commit 464231fb
"pinctrl: ssbi-gpio: Be sure to clamp return value"
commit b9164f04
"gpio: ssbi-mpp: Be sure to clamp return value"
as I managed to screw up some of the logic when clamping
the return values.

Cc: Björn Andersson <bjorn@kryo.se>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>