lan78xx: Enable Auto Speed and Auto Duplex configuration for LAN7801 if NO EEPROM is detected

Enabled ASD/ADD configuration for LAN7801 in the absence of EEPROM.
After the lite reset these contents go back to defaults where ASD/
ADD is disabled. The check is already available for LAN7800.
Reviewed-by: Simon Horman <horms@kernel.org>
Signed-off-by: Rengarajan S <rengarajan.s@microchip.com>
Link: https://lore.kernel.org/r/20240529140256.1849764-3-rengarajan.s@microchip.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/usb/lan78xx.c

@@ -3031,8 +3031,11 @@ static int lan78xx_reset(struct lan78xx_net *dev)
 		return ret;
 
 	/* LAN7801 only has RGMII mode */
-	if (dev->chipid == ID_REV_CHIP_ID_7801_)
+	if (dev->chipid == ID_REV_CHIP_ID_7801_) {
 		buf &= ~MAC_CR_GMII_EN_;
+		/* Enable Auto Duplex and Auto speed */
+		buf |= MAC_CR_AUTO_DUPLEX_ | MAC_CR_AUTO_SPEED_;
+	}
 
 	if (dev->chipid == ID_REV_CHIP_ID_7800_ ||
 	    dev->chipid == ID_REV_CHIP_ID_7850_) {