kbuild, mtd, net: a few comment typo fixes and rewording

Signed-off-by: Gilles Espinasse <g.esp@free.fr>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
diff --git a/drivers/mtd/nand/mxc_nand.c b/drivers/mtd/nand/mxc_nand.c
index ef932ba..5ae1d9e 100644
--- a/drivers/mtd/nand/mxc_nand.c
+++ b/drivers/mtd/nand/mxc_nand.c
@@ -722,9 +722,8 @@
 		/*
 		 * MXC NANDFC can only perform full page+spare or
 		 * spare-only read/write.  When the upper layers
-		 * layers perform a read/write buf operation,
-		 * we will used the saved column address to index into
-		 * the full page.
+		 * perform a read/write buf operation, the saved column
+		  * address is used to index into the full page.
 		 */
 		host->send_addr(host, 0, page_addr == -1);
 		if (mtd->writesize > 512)