net: core: Fix documentation

Fix bad grammar in description of init_dummy_netdev() function.  This
topic showed up in the review of the "allocate dummy device dynamically"
patch set.

Suggested-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: Breno Leitao <leitao@debian.org>
Reviewed-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/core/dev.c

@@ -10424,7 +10424,7 @@ EXPORT_SYMBOL(register_netdevice);
  *	init_dummy_netdev	- init a dummy network device for NAPI
  *	@dev: device to init
  *
- *	This takes a network device structure and initialize the minimum
+ *	This takes a network device structure and initializes the minimum
  *	amount of fields so it can be used to schedule NAPI polls without
  *	registering a full blown interface. This is to be used by drivers
  *	that need to tie several hardware interfaces to a single NAPI
@@ -10433,7 +10433,7 @@ EXPORT_SYMBOL(register_netdevice);
 void init_dummy_netdev(struct net_device *dev)
 {
 	/* Clear everything. Note we don't initialize spinlocks
-	 * are they aren't supposed to be taken by any of the
+	 * as they aren't supposed to be taken by any of the
 	 * NAPI code and this dummy netdev is supposed to be
 	 * only ever used for NAPI polls
 	 */