kni: update kernel API to set random MAC address

[ backported from upstream commit e6cbfd9 ]

Previously used 'random_ether_addr()' API is removed in upstream kernel
with commit
Commit ba530fea8ca1 ("ethernet: remove random_ether_addr()")

Replacement API 'eth_random_addr()' is around since v3.6 [1], so
simply switching to this API without any version checks.

[1]
0a4dd594982a ("etherdevice: Rename random_ether_addr to eth_random_addr")

Signed-off-by: Ferruh Yigit <ferruh.yigit@intel.com>

kernel/linux/kni/kni_misc.c

@@ -403,11 +403,8 @@ kni_ioctl_create(struct net *net, uint32_t ioctl_num,
 	if (is_valid_ether_addr(dev_info.mac_addr))
 		memcpy(net_dev->dev_addr, dev_info.mac_addr, ETH_ALEN);
 	else
-		/*
-		 * Generate random mac address. eth_random_addr() is the
-		 * newer version of generating mac address in kernel.
-		 */
-		random_ether_addr(net_dev->dev_addr);
+		/* Generate random MAC address. */
+		eth_random_addr(net_dev->dev_addr);
 
 	if (dev_info.mtu)
 		net_dev->mtu = dev_info.mtu;