lib: utils/cache: add cache enable function

Add functions to enable/disable the cache.

Signed-off-by: Ben Zong-You Xie <ben717@andestech.com>
Link: https://lore.kernel.org/r/20251229071914.1451587-4-ben717@andestech.com
Signed-off-by: Anup Patel <anup@brainfault.org>

lib/utils/cache/cache.c

@@ -44,3 +44,14 @@ int cache_flush_all(struct cache_device *dev)
 
 	return dev->ops->cache_flush_all(dev);
 }
+
+int cache_enable(struct cache_device *dev, bool enable)
+{
+	if (!dev)
+		return SBI_ENODEV;
+
+	if (!dev->ops || !dev->ops->cache_enable)
+		return SBI_ENOTSUPP;
+
+	return dev->ops->cache_enable(dev, enable);
+}