tty: 8250: Fix up PX-803/PX-857

The PX-803/PX-857 are variants of each other, add a note.
Additionally fix up the port counts for the card (2, not 1).

Fixes: ef5a03a ("tty: 8250: Add support for Brainboxes PX cards.")
Cc: stable@vger.kernel.org
Signed-off-by: Cameron Williams <cang1@live.co.uk>
Link: https://lore.kernel.org/r/DU0PR02MB789978C8ED872FB4B014E132C4DBA@DU0PR02MB7899.eurprd02.prod.outlook.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Author: Cameron Williams

drivers/tty/serial/8250/8250_pci.c

@@ -5285,16 +5285,16 @@ static const struct pci_device_id serial_pci_tbl[] = {
 		0, 0,
 		pbn_oxsemi_4_15625000 },
 	/*
-	 * Brainboxes PX-803
+	 * Brainboxes PX-803/PX-857
 	 */
 	{	PCI_VENDOR_ID_INTASHIELD, 0x4009,
 		PCI_ANY_ID, PCI_ANY_ID,
 		0, 0,
-		pbn_b0_1_115200 },
+		pbn_b0_2_115200 },
 	{	PCI_VENDOR_ID_INTASHIELD, 0x401E,
 		PCI_ANY_ID, PCI_ANY_ID,
 		0, 0,
-		pbn_oxsemi_1_15625000 },
+		pbn_oxsemi_2_15625000 },
 	/*
 	 * Brainboxes PX-846
 	 */