Fix typos in comments.

From-SVN: r9740

gcc/config/i960/i960.md

@@ -24,7 +24,7 @@
 
 ;; There are very few (4) 'f' registers, they can't be loaded/stored from/to
 ;; memory, and some instructions explicitly require them, so we get better
-;; code by discouraging psuedo-registers from being allocated to them.
+;; code by discouraging pseudo-registers from being allocated to them.
 ;; However, we do want to allow all patterns which can store to them to
 ;; include them in their constraints, so we always use '*f' in a destination
 ;; constraint except when 'f' is the only alternative.