CONFIG_SPL_SYS_[DI]CACHE_OFF: add

While converting CONFIG_SYS_[DI]CACHE_OFF to Kconfig, there are instances
where these configuration items are conditional on SPL. This commit adds SPL
variants of these configuration items, uses CONFIG_IS_ENABLED(), and updates
the configurations as required.

Acked-by: Alexey Brodkin <abrodkin@synopsys.com>
Signed-off-by: Trevor Woerner <trevor@toganlabs.com>
[trini: Make the default depend on the setting for full U-Boot, update
more zynq hardware]
Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/drivers/video/video-uclass.c b/drivers/video/video-uclass.c
index 14aac88..b19bfb4 100644
--- a/drivers/video/video-uclass.c
+++ b/drivers/video/video-uclass.c
@@ -149,7 +149,7 @@
 	 * architectures do not actually implement it. Is there a way to find
 	 * out whether it exists? For now, ARM is safe.
 	 */
-#if defined(CONFIG_ARM) && !defined(CONFIG_SYS_DCACHE_OFF)
+#if defined(CONFIG_ARM) && !CONFIG_IS_ENABLED(SYS_DCACHE_OFF)
 	struct video_priv *priv = dev_get_uclass_priv(vid);
 
 	if (priv->flush_dcache) {