[components][drivers]fix some uninitialize err (#8806)

fix some uninitialize err

components/drivers/clk/clk.c

@@ -1028,7 +1028,7 @@ rt_ssize_t rt_ofw_count_of_clk(struct rt_ofw_node *clk_ofw_np)
 
             if (prop)
             {
-                rt_uint32_t max_idx, idx;
+                rt_uint32_t max_idx = 0, idx;
 
                 for (cell = rt_ofw_prop_next_u32(prop, RT_NULL, &idx);
                     cell;

components/drivers/ofw/base.c

@@ -870,7 +870,7 @@ struct rt_ofw_node *rt_ofw_get_cpu_node(int cpu, int *thread, rt_bool_t (*match_
 
     rt_ofw_foreach_cpu_node(cpu_np)
     {
-        rt_ssize_t prop_len;
+        rt_ssize_t prop_len = 0;
         rt_bool_t is_end = RT_FALSE;
         int tid, addr_cells = rt_ofw_io_addr_cells(cpu_np);
         const fdt32_t *cell = rt_ofw_prop_read_raw(cpu_np, propname, &prop_len);

components/drivers/ofw/irq.c

@@ -43,7 +43,7 @@ static rt_err_t ofw_parse_irq_map(struct rt_ofw_node *np, struct rt_ofw_cell_arg
     struct rt_ofw_node *ic_np = RT_NULL;
     const fdt32_t *addr, *map, *map_mask;
     int child_address_cells, child_interrupt_cells;
-    int parent_address_cells, parent_interrupt_cells;
+    int parent_address_cells = 0, parent_interrupt_cells = 0;
     int addr_cells, pin_cells, icaddr_cells, idx1, idx2, limit;
 
     /*