Fix common misspellings

Fixes generated by 'codespell' and manually reviewed.

Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
diff --git a/drivers/telephony/ixj.h b/drivers/telephony/ixj.h
index 4c32a43..2c84113 100644
--- a/drivers/telephony/ixj.h
+++ b/drivers/telephony/ixj.h
@@ -1149,7 +1149,7 @@
 	unsigned int firstring:1; /* First ring cadence is complete */
 	unsigned int pstncheck:1;	/* Currently checking the PSTN Line */
 	unsigned int pstn_rmr:1;
-	unsigned int x:3;	/* unsed bits */
+	unsigned int x:3;	/* unused bits */
 
 } IXJ_FLAGS;