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: I951ec38ae08ba0b20733dce1300546f4a7541eff
Signed-off-by: Gunnar Mills <gmills@us.ibm.com>
diff --git a/command/channel_auth.cpp b/command/channel_auth.cpp
index c6e68be..6b757a6 100644
--- a/command/channel_auth.cpp
+++ b/command/channel_auth.cpp
@@ -19,7 +19,7 @@
     // A canned response, since there is no user and channel management.
     response->completionCode = IPMI_CC_OK ;
 
-    // Channel Number 1 is arbitarily applied to primary LAN channel;
+    // Channel Number 1 is arbitrarily applied to primary LAN channel;
     response->channelNumber = 1;
 
     response->ipmiVersion = 1 ;     //IPMI v2.0 extended capabilities available.