mm: define VM_GROWSUP for CONFIG_METAG

Commit cc2383ec06be093789469852e1fe96e1148e9a2c ("mm: introduce
arch-specific vma flag VM_ARCH_1") merged in v3.7-rc1.

The above commit combined several arch-specific vma flags into one, and
in the process it changed the VM_GROWSUP definition to depend on
specific architectures rather than CONFIG_STACK_GROWSUP. Therefore add
an ifdef for CONFIG_METAG to also set VM_GROWSUP.

Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Konstantin Khlebnikov <khlebnikov@openvz.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Michel Lespinasse <walken@google.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: linux-mm@kvack.org

include/linux/mm.h

@@ -114,6 +114,8 @@ extern unsigned int kobjsize(const void *objp);
 # define VM_SAO		VM_ARCH_1	/* Strong Access Ordering (powerpc) */
 #elif defined(CONFIG_PARISC)
 # define VM_GROWSUP	VM_ARCH_1
+#elif defined(CONFIG_METAG)
+# define VM_GROWSUP	VM_ARCH_1
 #elif defined(CONFIG_IA64)
 # define VM_GROWSUP	VM_ARCH_1
 #elif !defined(CONFIG_MMU)