riscv: ae350: use the v5l2 driver to configure the cache

Find the UCLASS_CACHE driver to configure the cache controller's
settings.

Signed-off-by: Rick Chen <rick@andestech.com>
Cc: KC Lin <kclin@andestech.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
diff --git a/board/AndesTech/ax25-ae350/ax25-ae350.c b/board/AndesTech/ax25-ae350/ax25-ae350.c
index 3d65ce7..b43eebb 100644
--- a/board/AndesTech/ax25-ae350/ax25-ae350.c
+++ b/board/AndesTech/ax25-ae350/ax25-ae350.c
@@ -11,6 +11,7 @@
 #include <linux/io.h>
 #include <faraday/ftsmc020.h>
 #include <fdtdec.h>
+#include <dm.h>
 
 DECLARE_GLOBAL_DATA_PTR;
 
@@ -93,10 +94,18 @@
 	return 0;
 }
 
+static void v5l2_init(void)
+{
+	struct udevice *dev;
+
+	uclass_get_device(UCLASS_CACHE, 0, &dev);
+}
+
 #ifdef CONFIG_BOARD_EARLY_INIT_F
 int board_early_init_f(void)
 {
 	smc_init();
+	v5l2_init();
 
 	return 0;
 }