Thank you for providing the code and identifying the CWE-476 vulnerability. CWE-476 is related to NULL Pointer Dereference. To address this vulnerability, we need to ensure that the 'np' parameter is not NULL before calling __of_find_property(). Here are five possible patches:

Patch 1:
```c
8 	raw_spin_lock_irqsave(&devtree_lock, flags);
9 	pp = np ? __of_find_property(np, name, lenp) : NULL;
10 	raw_spin_unlock_irqrestore(&devtree_lock, flags);
```

Patch 2:
```c
7 
8 	if (!np) return NULL;
9 	raw_spin_lock_irqsave(&devtree_lock, flags);
10 	pp = __of_find_property(np, name, lenp);
11 	raw_spin_unlock_irqrestore(&devtree_lock, flags);
```

Patch 3:
```c
8 	raw_spin_lock_irqsave(&devtree_lock, flags);
9 	pp = (np != NULL) ? __of_find_property(np, name, lenp) : NULL;
10 	raw_spin_unlock_irqrestore(&devtree_lock, flags);
```

Patch 4:
```c
7 
8 	if (np == NULL) {
9 		return NULL;
10 	}
11 	raw_spin_lock_irqsave(&devtree_lock, flags);
12 	pp = __of_find_property(np, name, lenp);
13 	raw_spin_unlock_irqrestore(&devtree_lock, flags);
```

Patch 5:
```c
8 	raw_spin_lock_irqsave(&devtree_lock, flags);
9 	pp = NULL;
10 	if (np) {
11 		pp = __of_find_property(np, name, lenp);
12 	}
13 	raw_spin_unlock_irqrestore(&devtree_lock, flags);
```

Each of these patches checks for a NULL 'np' before calling __of_find_property(), preventing a potential NULL pointer dereference.