Fix exported comments enforcer in CI

Add comments where missing and fix incorrect comments

Signed-off-by: Derek McGowan <derek@mcg.dev>

snapshots/devmapper/pool_device.go

@@ -395,6 +395,7 @@ func (p *PoolDevice) SuspendDevice(ctx context.Context, deviceName string) error
 	return nil
 }
 
+// ResumeDevice resumes IO for the given device
 func (p *PoolDevice) ResumeDevice(ctx context.Context, deviceName string) error {
 	if err := p.transition(ctx, deviceName, Resuming, Resumed, func() error {
 		return dmsetup.ResumeDevice(deviceName)

snapshots/devmapper/snapshotter.go

@@ -482,6 +482,7 @@ func (s *Snapshotter) withTransaction(ctx context.Context, writable bool, fn fun
 	return nil
 }
 
+// Cleanup cleans up all removed and unused resources
 func (s *Snapshotter) Cleanup(ctx context.Context) error {
 	var removedDevices []*DeviceInfo