Correct errno value.

Returning -{ERRVAL} is a kernel return convention, but userspace errno
assignment and associated functions deal with the positive numbers.
Correct the errno assignment introduced in
commit: 78899de14b476a759f4839eae4879d47e36a624a.

(cherry-pick of commit: 034c53e93a736f8b6f9aac90938ef65ffcaac9da)

AOSP Bug: 200617
Bug: 27111481

Change-Id: I174dac888c06d096d361eab5efcde169f7899726
1 file changed