arch/tile: fix a couple of comments that needed updating

Not associated with any code changes, so I'm just lumping these
comment changes into a commit by themselves.

Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
diff --git a/arch/tile/mm/fault.c b/arch/tile/mm/fault.c
index cba30e9..cac17c4 100644
--- a/arch/tile/mm/fault.c
+++ b/arch/tile/mm/fault.c
@@ -130,7 +130,7 @@
 }
 
 /*
- * Handle a fault on the vmalloc or module mapping area
+ * Handle a fault on the vmalloc area.
  */
 static inline int vmalloc_fault(pgd_t *pgd, unsigned long address)
 {