riscv: fu540: Use correct API to get L2 cache controller base address

At present fdtdec_get_addr() is used to get L2 cache controller base
address. This only works for a fixed #address-cells and #size-cells.
Change to use fdtdec_get_addr_size_auto_parent() instead.

Signed-off-by: Bin Meng <bin.meng@windriver.com>
Reviewed-by: Rick Chen <rick@andestech.com>
Reviewed-by: Pragnesh Patel <pragnesh.patel@openfive.com>

arch/riscv/cpu/fu540/cache.c

@@ -35,7 +35,8 @@ int cache_enable_ways(void)
 	if (node < 0)
 		return node;
 
-	base = fdtdec_get_addr(blob, node, "reg");
+	base = fdtdec_get_addr_size_auto_parent(blob, 0, node, "reg", 0,
+						NULL, false);
 	if (base == FDT_ADDR_T_NONE)
 		return FDT_ADDR_T_NONE;