net: thunderx: Fix set_max_bgx_per_node for 81xx rgx

Add the PCI_SUBSYS_DEVID_81XX_RGX and use the same to set
the max bgx per node count.

This fixes the issue intoduced by following commit
78aacb6f net: thunderx: Fix invalid mac addresses for node1 interfaces
With this commit the max_bgx_per_node for 81xx is set as 2 instead of 3
because of which num_vfs is always calculated as zero.
Signed-off-by: NGeorge Cherian <george.cherian@cavium.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/ethernet/cavium/thunder/thunder_bgx.c

@@ -134,6 +134,7 @@ static void set_max_bgx_per_node(struct pci_dev *pdev)
 	pci_read_config_word(pdev, PCI_SUBSYSTEM_ID, &sdevid);
 	switch (sdevid) {
 	case PCI_SUBSYS_DEVID_81XX_BGX:
+	case PCI_SUBSYS_DEVID_81XX_RGX:
 		max_bgx_per_node = MAX_BGX_PER_CN81XX;
 		break;
 	case PCI_SUBSYS_DEVID_83XX_BGX:

drivers/net/ethernet/cavium/thunder/thunder_bgx.h

@@ -16,6 +16,7 @@
 /* Subsystem device IDs */
 #define PCI_SUBSYS_DEVID_88XX_BGX		0xA126
 #define PCI_SUBSYS_DEVID_81XX_BGX		0xA226
+#define PCI_SUBSYS_DEVID_81XX_RGX		0xA254
 #define PCI_SUBSYS_DEVID_83XX_BGX		0xA326
 
 #define    MAX_BGX_THUNDER			8 /* Max 2 nodes, 4 per node */