Trivial: Clean up some typos.

Change-Id: I085615fde1f966490f30ed5d32017b8b088cfd59
Signed-off-by: Paul Vinciguerra <pvinci@vinciconsulting.com>
diff --git a/src/vnet/span/span.api b/src/vnet/span/span.api
index 7b2e47c..9081243 100644
--- a/src/vnet/span/span.api
+++ b/src/vnet/span/span.api
@@ -19,7 +19,7 @@
  /** \brief Enable/Disable span to mirror traffic from one interface to another
     @param client_index - opaque cookie to identify the sender
     @param context - sender context which was passed in the request
-    @param sw_if_index_from - interface to be mirorred
+    @param sw_if_index_from - interface to be mirrored
     @param sw_if_index_to - interface where the traffic is mirrored
     @param state - 0 = disabled, 1 = rx enabled, 2 = tx enabled, 3 tx & rx enabled
     @param is_l2 - 0 = mirror at hw device level, 1 = mirror at L2
@@ -46,7 +46,7 @@
 
 /** \brief Reply to SPAN dump request
     @param context - sender context which was passed in the request
-    @param sw_if_index_from - mirorred interface
+    @param sw_if_index_from - mirrored interface
     @param sw_if_index_to - interface where the traffic is mirrored
     @param state - 0 = disabled, 1 = rx enabled, 2 = tx enabled, 3 tx & rx enabled
     @param is_l2 - 0 = mirrored at hw device level, 1 = mirrored at l2