Comment typo fixes for 'descriptor'

Signed-off-by: Justin P. Mattock <justinmattock@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
diff --git a/drivers/net/sungem.h b/drivers/net/sungem.h
index 1990546..bfb6683 100644
--- a/drivers/net/sungem.h
+++ b/drivers/net/sungem.h
@@ -843,7 +843,7 @@
 
 /* GEM requires that RX descriptors are provided four at a time,
  * aligned.  Also, the RX ring may not wrap around.  This means that
- * there will be at least 4 unused desciptor entries in the middle
+ * there will be at least 4 unused descriptor entries in the middle
  * of the RX ring at all times.
  *
  * Similar to HME, GEM assumes that it can write garbage bytes before