Fix common misspellings

Fixes generated by 'codespell' and manually reviewed.

Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
diff --git a/drivers/net/wireless/iwlegacy/iwl-sta.c b/drivers/net/wireless/iwlegacy/iwl-sta.c
index 47c9da3..66f0fb2 100644
--- a/drivers/net/wireless/iwlegacy/iwl-sta.c
+++ b/drivers/net/wireless/iwlegacy/iwl-sta.c
@@ -110,7 +110,7 @@
 	/*
 	 * XXX: The MAC address in the command buffer is often changed from
 	 * the original sent to the device. That is, the MAC address
-	 * written to the command buffer often is not the same MAC adress
+	 * written to the command buffer often is not the same MAC address
 	 * read from the command buffer when the command returns. This
 	 * issue has not yet been resolved and this debugging is left to
 	 * observe the problem.