mm: fix CONFIG_STACK_GROWSUP typo in mm.h

Commit 2b6a3f061f ("mm: declare VMA flags by bit") significantly
refactors the header file include/linux/mm.h.  In that step, it introduces
a typo in an ifdef, referring to a non-existing config option
STACK_GROWS_UP, whereas the actual config option is called STACK_GROWSUP.

Fix this typo in the mm header file.

Link: https://lkml.kernel.org/r/[email protected]
Fixes: 2b6a3f061f ("mm: declare VMA flags by bit")
Signed-off-by: Lukas Bulwahn <[email protected]>
Acked-by: David Hildenbrand (Red Hat) <[email protected]>
Reviewed-by: Lorenzo Stoakes <[email protected]>
Cc: Alice Ryhl <[email protected]>
Cc: Liam Howlett <[email protected]>
Cc: Michal Hocko <[email protected]>
Cc: Mike Rapoport <[email protected]>
Cc: Suren Baghdasaryan <[email protected]>
Cc: Vlastimil Babka <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>

include/linux/mm.h

@@ -438,7 +438,7 @@ enum {
 #define VM_NOHUGEPAGE	INIT_VM_FLAG(NOHUGEPAGE)
 #define VM_MERGEABLE	INIT_VM_FLAG(MERGEABLE)
 #define VM_STACK	INIT_VM_FLAG(STACK)
-#ifdef CONFIG_STACK_GROWS_UP
+#ifdef CONFIG_STACK_GROWSUP
 #define VM_STACK_EARLY	INIT_VM_FLAG(STACK_EARLY)
 #else
 #define VM_STACK_EARLY	VM_NONE