op-pwrctl: Fix polarity of power outputs

The power GPIO logic introduced in
I83d55a7069558ec810bc2e0dbbff1c5495957e6d produces inverted polarity
outputs for power-up and reset signals. This fixes the logic and allows
systems to boot again.

Change-Id: I0830b46c0c0c1e337085050483da0250d5d850f5
Signed-off-by: Xo Wang <xow@google.com>
1 file changed