Spelling fixes

Spelling errors found using github.com/lucasdemarchi/codespell
A tool to fix common misspellings.
This tool is licensed under GNU General Public License, version 2.

Change-Id: Ia0a4d655510a1d5f81ac369bdad9f7cfbd675484
Signed-off-by: Gunnar Mills <gmills@us.ibm.com>
diff --git a/ethernet_interface.hpp b/ethernet_interface.hpp
index 5c088bd..5109e42 100644
--- a/ethernet_interface.hpp
+++ b/ethernet_interface.hpp
@@ -183,7 +183,7 @@
          *  @param[in] addressType - Type of ip address.
          *  @param[in] ipaddress - IP address.
          *  @param[in] prefixLength - Length of prefix.
-         *  @param[in] gateway - Gateway addess.
+         *  @param[in] gateway - Gateway address.
 
          *  @return path of the address object.
          */
@@ -197,7 +197,7 @@
          *         prefixlength and the gateway.
          *  @param[in] ipaddress - IP address.
          *  @param[in] prefixLength - Length of prefix.
-         *  @param[in] gateway - Gateway addess.
+         *  @param[in] gateway - Gateway address.
          *  @return hash string.
          */