driver.h: Fix two driver documentation mistakes

AUTHORS

@@ -187,6 +187,7 @@ Patches have also been contributed by:
   Oskari Saarenmaa     <os@ohmu.fi>
   Peter Krempa         <pkrempa@redhat.com>
   Nan Zhang            <nzhang@redhat.com>
+  Wieland Hoffmann     <themineo@googlemail.com>
 
   [....send patches to get your name here....]
 

src/driver.h

@@ -1000,7 +1000,7 @@ typedef virInterfaceDriver *virInterfaceDriverPtr;
 /**
  * _virInterfaceDriver:
  *
- * Structure associated to a network virtualization driver, defining the various
+ * Structure associated to a network interface driver, defining the various
  * entry points for it.
  *
  * All drivers must support the following fields/methods:
@@ -1161,7 +1161,7 @@ typedef virStorageDriver *virStorageDriverPtr;
 /**
  * _virStorageDriver:
  *
- * Structure associated to a network virtualization driver, defining the various
+ * Structure associated to a storage driver, defining the various
  * entry points for it.
  *
  * All drivers must support the following fields/methods: