clk: renesas: cpg-mssr: Fix memory leak in cpg_mssr_reserved_init()

In case of krealloc_array() failure, the current error handling just
returns from the function without freeing the original array.
Fix this memory leak by freeing the original array.

Fixes: 6aa1754 ("clk: renesas: cpg-mssr: Ignore all clocks assigned to non-Linux system")
Signed-off-by: Yuan CHen <chenyuan@kylinos.cn>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://patch.msgid.link/20250908012810.4767-1-chenyuan_fl@163.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>

Author: chenyuan0001

drivers/clk/renesas/renesas-cpg-mssr.c

@@ -1082,6 +1082,7 @@ static int __init cpg_mssr_reserved_init(struct cpg_mssr_priv *priv,
 
 		of_for_each_phandle(&it, rc, node, "clocks", "#clock-cells", -1) {
 			int idx;
+			unsigned int *new_ids;
 
 			if (it.node != priv->np)
 				continue;
@@ -1092,11 +1093,13 @@ static int __init cpg_mssr_reserved_init(struct cpg_mssr_priv *priv,
 			if (args[0] != CPG_MOD)
 				continue;
 
-			ids = krealloc_array(ids, (num + 1), sizeof(*ids), GFP_KERNEL);
-			if (!ids) {
+			new_ids = krealloc_array(ids, (num + 1), sizeof(*ids), GFP_KERNEL);
+			if (!new_ids) {
 				of_node_put(it.node);
+				kfree(ids);
 				return -ENOMEM;
 			}
+			ids = new_ids;
 
 			if (priv->reg_layout == CLK_REG_LAYOUT_RZ_A)
 				idx = MOD_CLK_PACK_10(args[1]);	/* for DEF_MOD_STB() */