mm: collapse security_vm_enough_memory() variants into a single function

Collapse security_vm_enough_memory() variants into a single function.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: James Morris <jmorris@namei.org>
diff --git a/mm/mremap.c b/mm/mremap.c
index 87bb839..db8d983 100644
--- a/mm/mremap.c
+++ b/mm/mremap.c
@@ -329,7 +329,7 @@
 
 	if (vma->vm_flags & VM_ACCOUNT) {
 		unsigned long charged = (new_len - old_len) >> PAGE_SHIFT;
-		if (security_vm_enough_memory(charged))
+		if (security_vm_enough_memory_mm(mm, charged))
 			goto Efault;
 		*p = charged;
 	}