nvmem: use list_for_each_entry_safe in nvmem_device_remove_all_cells()

Use the provided helper for iterating over list entries without having
to use the list_entry() macro.
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/nvmem/core.c

@@ -308,14 +308,11 @@ static void nvmem_cell_drop(struct nvmem_cell *cell)
 
 static void nvmem_device_remove_all_cells(const struct nvmem_device *nvmem)
 {
-	struct nvmem_cell *cell;
-	struct list_head *p, *n;
+	struct nvmem_cell *cell, *p;
 
-	list_for_each_safe(p, n, &nvmem_cells) {
-		cell = list_entry(p, struct nvmem_cell, node);
+	list_for_each_entry_safe(cell, p, &nvmem_cells, node)
 		if (cell->nvmem == nvmem)
 			nvmem_cell_drop(cell);
-	}
 }
 
 static void nvmem_cell_add(struct nvmem_cell *cell)