Blackfin: fix unused warnings after nommu update

The massive nommu update (8feae131) left the local variable "vml" unused,
so punt it.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>

arch/blackfin/kernel/traps.c

@@ -86,7 +86,6 @@ void __init trap_init(void)
 static void decode_address(char *buf, unsigned long address)
 {
 #ifdef CONFIG_DEBUG_VERBOSE
-	struct vm_list_struct *vml;
 	struct task_struct *p;
 	struct mm_struct *mm;
 	unsigned long flags, offset;