e1000e: Remove duplicate assignment of default rx/tx ring size

tx_ring/rx_ring size is assigned in function e1000_alloc_queues(), which is
called by e1000_sw_init() in the early stage of e1000_probe().

This patch just remove the duplicate assignment of this default ring size
value.

Signed-off-by: Wei Yang <weiyang@linux.vnet.ibm.com>
Reviewed-by: Gavin Shan <shangw@linux.vnet.ibm.com>
Reviewed-by: Da Yu Qiu <qiudayu@cn.ibm.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Acked-by: Bruce Allan <bruce.w.allan@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

drivers/net/ethernet/intel/e1000e/netdev.c

@@ -6725,10 +6725,6 @@ static int e1000_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 	adapter->hw.fc.current_mode = e1000_fc_default;
 	adapter->hw.phy.autoneg_advertised = 0x2f;
 
-	/* ring size defaults */
-	adapter->rx_ring->count = E1000_DEFAULT_RXD;
-	adapter->tx_ring->count = E1000_DEFAULT_TXD;
-
 	/* Initial Wake on LAN setting - If APM wake is enabled in
 	 * the EEPROM, enable the ACPI Magic Packet filter
 	 */