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: I8af789c1e0fef9938baced40315b525199636601
Signed-off-by: Gunnar Mills <gmills@us.ibm.com>
diff --git a/pmbus.hpp b/pmbus.hpp
index 55e3ff6..b6a01f6 100644
--- a/pmbus.hpp
+++ b/pmbus.hpp
@@ -302,7 +302,7 @@
         /**
          * The device instance number.
          *
-         * Used in conjuction with the driver name for finding
+         * Used in conjunction with the driver name for finding
          * the debug directory.  Not required if that directory
          * isn't used.
          */