mtd: spelling fixes

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@intel.com>
diff --git a/drivers/mtd/mtdswap.c b/drivers/mtd/mtdswap.c
index 5e5423b..9961063 100644
--- a/drivers/mtd/mtdswap.c
+++ b/drivers/mtd/mtdswap.c
@@ -86,7 +86,7 @@
 	unsigned int flags;
 	unsigned int active_count;
 	unsigned int erase_count;
-	unsigned int pad;		/* speeds up pointer decremtnt */
+	unsigned int pad;		/* speeds up pointer decrement */
 };
 
 #define MTDSWAP_ECNT_MIN(rbroot) (rb_entry(rb_first(rbroot), struct swap_eb, \