net/spnic: Fix ethtool loopback command failure

Ramaxel inclusion
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I4TPKM
CVE: NA

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Fix ethtool loopback command failure
Signed-off-by: NYanling Song <songyl@ramaxel.com>
Reviewed-by: Nwenliang <wenliang@ramaxel.com>
Acked-by: NXie XiuQi <xiexiuqi@huawei.com>
Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com>

drivers/net/ethernet/ramaxel/spnic/spnic_mag_cfg.c

@@ -178,7 +178,7 @@ int spnic_set_loopback_mode(void *hwdev, u8 mode, u8 enable)
 		return -EINVAL;
 	}
 
-	return spnic_cfg_loopback_mode(nic_cfg, MGMT_MSG_CMD_OP_GET, &mode, &enable);
+	return spnic_cfg_loopback_mode(nic_cfg, MGMT_MSG_CMD_OP_SET, &mode, &enable);
 }
 
 int spnic_set_led_status(void *hwdev, enum mag_led_type type, enum mag_led_mode mode)