soc: sunxi: sram: Only iterate over SRAM children

Now that a regulators child is accepted by the controller binding, the
debugfs show routine must be explicitly limited to mmio-sram children.
Acked-by: Jernej Skrabec <jernej.skrabec@gmail.com>
Signed-off-by: Samuel Holland <samuel@sholland.org>
Link: https://lore.kernel.org/r/20221208084127.17443-5-samuel@sholland.orgSigned-off-by: Jernej Skrabec <jernej.skrabec@gmail.com>

drivers/soc/sunxi/sunxi_sram.c

@@ -120,6 +120,9 @@ static int sunxi_sram_show(struct seq_file *s, void *data)
 	seq_puts(s, "--------------------\n\n");
 
 	for_each_child_of_node(sram_dev->of_node, sram_node) {
+		if (!of_device_is_compatible(sram_node, "mmio-sram"))
+			continue;
+
 		sram_addr_p = of_get_address(sram_node, 0, NULL, NULL);
 
 		seq_printf(s, "sram@%08x\n",