drm/nouveau/bios: downgrade absence of tmds table to info from an error

Absence of a TMDS Info Table is common on Optimus setups where the NVIDIA
gpu is not connected directly to any outputs.

Reporting an error in this scenario is too harsh. Accordingly, change the
error message to an info message.

By default the error message also causes a boot flicker for these sytems.
Signed-off-by: Rhys Kidd <rhyskidd@gmail.com>
Reviewed-by: Lyude Paul <lyude@redhat.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

drivers/gpu/drm/nouveau/nouveau_bios.c

@@ -933,7 +933,7 @@ static int parse_bit_tmds_tbl_entry(struct drm_device *dev, struct nvbios *bios,
 
 	tmdstableptr = ROM16(bios->data[bitentry->offset]);
 	if (!tmdstableptr) {
-		NV_ERROR(drm, "Pointer to TMDS table invalid\n");
+		NV_INFO(drm, "Pointer to TMDS table not found\n");
 		return -EINVAL;
 	}