[SERIAL] Add SupraExpress 336i Sp ASVD modem ID

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/drivers/serial/8250_pnp.c b/drivers/serial/8250_pnp.c
index 6b321e8..c2786fc 100644
--- a/drivers/serial/8250_pnp.c
+++ b/drivers/serial/8250_pnp.c
@@ -272,6 +272,8 @@
 	{	"SUP1421",		0	},
 	/* SupraExpress 33.6 Data/Fax PnP modem */
 	{	"SUP1590",		0	},
+	/* SupraExpress 336i Sp ASVD */
+	{	"SUP1620",		0	},
 	/* SupraExpress 33.6 Data/Fax PnP modem */
 	{	"SUP1760",		0	},
 	/* Phoebe Micro */