lguest: update comments

Also removes a long-unused #define and an extraneous semicolon.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
diff --git a/drivers/lguest/page_tables.c b/drivers/lguest/page_tables.c
index 0002622..3b62be16 100644
--- a/drivers/lguest/page_tables.c
+++ b/drivers/lguest/page_tables.c
@@ -155,7 +155,7 @@
 }
 
 /*
- * These functions are just like the above two, except they access the Guest
+ * These functions are just like the above, except they access the Guest
  * page tables.  Hence they return a Guest address.
  */
 static unsigned long gpgd_addr(struct lg_cpu *cpu, unsigned long vaddr)
@@ -195,7 +195,7 @@
 #endif
 /*:*/
 
-/*M:014
+/*M:007
  * get_pfn is slow: we could probably try to grab batches of pages here as
  * an optimization (ie. pre-faulting).
 :*/