igb: Fix for improper allocation flag in igb_get_i2c_client

This patch fixes the allocation function in igb_get_i2c_client to use
GFP_ATOMIC instead of GFP_KERNEL because we have a spinlock.

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Carolyn Wyborny <carolyn.wyborny@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

drivers/net/ethernet/intel/igb/igb_main.c

@@ -7751,7 +7751,7 @@ igb_get_i2c_client(struct igb_adapter *adapter, u8 dev_addr)
 	}
 
 	/* no client_list found, create a new one */
-	client_list = kzalloc(sizeof(*client_list), GFP_KERNEL);
+	client_list = kzalloc(sizeof(*client_list), GFP_ATOMIC);
 	if (client_list == NULL)
 		goto exit;