soc: aspeed: socinfo: Add kfree for kstrdup

Add kfree() in the later error handling in order to avoid memory leak.

Fixes: e0218dca ("soc: aspeed: Add soc info driver")
Signed-off-by: Jiasheng Jiang <jiasheng@iscas.ac.cn>
Link: https://lore.kernel.org/r/20230707021625.7727-1-jiasheng@iscas.ac.cnSigned-off-by: Joel Stanley <joel@jms.id.au>
Link: https://lore.kernel.org/r/20230810123104.231167-1-joel@jms.id.auSigned-off-by: Arnd Bergmann <arnd@arndb.de>

drivers/soc/aspeed/aspeed-socinfo.c

@@ -137,6 +137,7 @@ static int __init aspeed_socinfo_init(void)
 
 	soc_dev = soc_device_register(attrs);
 	if (IS_ERR(soc_dev)) {
+		kfree(attrs->machine);
 		kfree(attrs->soc_id);
 		kfree(attrs->serial_number);
 		kfree(attrs);