fixing typos

Change-Id: I215e1e0208a073db80ec6f87695d734cf40fabe3
Signed-off-by: Jim Thompson <jim@netgate.com>
diff --git a/src/vnet/bier/bier_disp_entry.c b/src/vnet/bier/bier_disp_entry.c
index 98508ad..c143776 100644
--- a/src/vnet/bier/bier_disp_entry.c
+++ b/src/vnet/bier/bier_disp_entry.c
@@ -13,7 +13,7 @@
  * limitations under the License.
  */
 /**
- * bier_dispositon : The BIER disposition object
+ * bier_disposition : The BIER disposition object
  *
  * A BIER disposition object is present in the IP mcast output list
  * and represents the disposition of a BIER bitmask. After BIER header