treewide: fix a few typos in comments

- kenrel -> kernel
- whetehr -> whether
- ttt -> tt
- sss -> ss

Signed-off-by: Justin P. Mattock <justinmattock@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
diff --git a/drivers/net/wan/pc300_drv.c b/drivers/net/wan/pc300_drv.c
index f875cfa..737b59f 100644
--- a/drivers/net/wan/pc300_drv.c
+++ b/drivers/net/wan/pc300_drv.c
@@ -1445,7 +1445,7 @@
  * Description:	In the remote loopback mode the clock and data recovered
  *		from the line inputs RL1/2 or RDIP/RDIN are routed back
  *		to the line outputs XL1/2 or XDOP/XDON via the analog
- *		transmitter. As in normal mode they are processsed by
+ *		transmitter. As in normal mode they are processed by
  *		the synchronizer and then sent to the system interface.
  *----------------------------------------------------------------------------
  */