sfc: Use model numbers for PHY type names

Some of the PHY type names are overly generic.  Change them to include
the model numbers of the PHYs they represent.

Correct the model number reference at the top of xfp_phy.c.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/sfc/falcon.c b/drivers/net/sfc/falcon.c
index 13627a6..df844de 100644
--- a/drivers/net/sfc/falcon.c
+++ b/drivers/net/sfc/falcon.c
@@ -2252,7 +2252,7 @@
 	case PHY_TYPE_SFT9001B:
 		efx->phy_op = &falcon_sft9001_phy_ops;
 		break;
-	case PHY_TYPE_XFP:
+	case PHY_TYPE_QT2022C2:
 		efx->phy_op = &falcon_xfp_phy_ops;
 		break;
 	default: