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/net/dwc_eth_qos.c b/drivers/net/dwc_eth_qos.c
index 9f1c5af..590e756 100644
--- a/drivers/net/dwc_eth_qos.c
+++ b/drivers/net/dwc_eth_qos.c
@@ -241,7 +241,7 @@
  */
 #if EQOS_DESCRIPTOR_SIZE < ARCH_DMA_MINALIGN
 #if !defined(CONFIG_SYS_NONCACHED_MEMORY) && \
-	!defined(CONFIG_SYS_DCACHE_OFF) && !defined(CONFIG_X86)
+	!CONFIG_IS_ENABLED(SYS_DCACHE_OFF) && !defined(CONFIG_X86)
 #warning Cache line size is larger than descriptor size
 #endif
 #endif