[dev.ssa] cmd/internal/ssa: fix typo

Change-Id: I2209da94f1fd76267847d8d599e17f9d9a296ed3
Reviewed-on: https://go-review.googlesource.com/8320
Reviewed-by: Alan Donovan <adonovan@google.com>
diff --git a/src/cmd/internal/ssa/cse.go b/src/cmd/internal/ssa/cse.go
index 71f2301..c44b08f 100644
--- a/src/cmd/internal/ssa/cse.go
+++ b/src/cmd/internal/ssa/cse.go
@@ -56,7 +56,7 @@
 	}
 
 	// Find an equivalence class where some members of the class have
-	// non-equvalent arguments.  Split the equivalence class appropriately.
+	// non-equivalent arguments.  Split the equivalence class appropriately.
 	// Repeat until we can't find any more splits.
 	for {
 		changed := false