octeon_ep: support Octeon device CNF95N

Add support for Octeon device CNF95N.
CNF95N is a Octeon Fusion family product with same PCI NIC
characteristics as CN93 which is currently supported by the driver.

update supported device list in Documentation.

Signed-off-by: Veerasenareddy Burru <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Jakub Kicinski <[e-mail]>

Documentation/networking/device_drivers/ethernet/marvell/octeon_ep.rst

···
 =================
 Currently, this driver support following devices:
  * Network controller: Cavium, Inc. Device b200
+ * Network controller: Cavium, Inc. Device b400
 
 Interface Control
 =================

drivers/net/ethernet/marvell/octeon_ep/octep_main.c

···
 /* Supported Devices */
 static const struct pci_device_id octep_pci_id_tbl[] = {
 	{PCI_DEVICE(PCI_VENDOR_ID_CAVIUM, OCTEP_PCI_DEVICE_ID_CN93_PF)},
+	{PCI_DEVICE(PCI_VENDOR_ID_CAVIUM, OCTEP_PCI_DEVICE_ID_CNF95N_PF)},
 	{0, },
 };
 MODULE_DEVICE_TABLE(pci, octep_pci_id_tbl);
···
 	}
 }
 
+static const char *octep_devid_to_str(struct octep_device *oct)
+{
+	switch (oct->chip_id) {
+	case OCTEP_PCI_DEVICE_ID_CN93_PF:
+		return "CN93XX";
+	case OCTEP_PCI_DEVICE_ID_CNF95N_PF:
+		return "CNF95N";
+	default:
+		return "Unsupported";
+	}
+}
+
 /**
  * octep_device_setup() - Setup Octeon Device.
  *
···
 
 	switch (oct->chip_id) {
 	case OCTEP_PCI_DEVICE_ID_CN93_PF:
-		dev_info(&pdev->dev,
-			 "Setting up OCTEON CN93XX PF PASS%d.%d\n",
-			 OCTEP_MAJOR_REV(oct), OCTEP_MINOR_REV(oct));
+	case OCTEP_PCI_DEVICE_ID_CNF95N_PF:
+		dev_info(&pdev->dev, "Setting up OCTEON %s PF PASS%d.%d\n",
+			 octep_devid_to_str(oct), OCTEP_MAJOR_REV(oct),
+			 OCTEP_MINOR_REV(oct));
 		octep_device_setup_cn93_pf(oct);
 		break;
 	default:

drivers/net/ethernet/marvell/octeon_ep/octep_main.h

···
 #define  OCTEP_PCI_DEVICE_ID_CN93_PF 0xB200
 #define  OCTEP_PCI_DEVICE_ID_CN93_VF 0xB203
 
+#define  OCTEP_PCI_DEVICE_ID_CNF95N_PF 0xB400    //95N PF
+
 #define  OCTEP_MAX_QUEUES   63
 #define  OCTEP_MAX_IQ       OCTEP_MAX_QUEUES
 #define  OCTEP_MAX_OQ       OCTEP_MAX_QUEUES