drm/nouveau: correct INIT_DP_CONDITION subcondition 5

Fixes DP output on a GTX 465 board I have.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
diff --git a/drivers/gpu/drm/nouveau/nouveau_bios.c b/drivers/gpu/drm/nouveau/nouveau_bios.c
index 8d60bfd..7b7b1e2 100644
--- a/drivers/gpu/drm/nouveau/nouveau_bios.c
+++ b/drivers/gpu/drm/nouveau/nouveau_bios.c
@@ -1222,7 +1222,7 @@
 			return 3;
 		}
 
-		if (cond & 1)
+		if (!(cond & 1))
 			iexec->execute = false;
 	}
 		break;