ARM: kirkwood: Split DT and legacy MBus initialization

This commit replaces the legacy MBus initialization with the new
DT-based in Kirkwood. For boards that are not yet converted to DT,
we keep the legacy initialization.

Signed-off-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Tested-by: Andrew Lunn <andrew@lunn.ch>
Tested-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
diff --git a/arch/arm/mach-kirkwood/board-dt.c b/arch/arm/mach-kirkwood/board-dt.c
index 6e122ed..682b7ac 100644
--- a/arch/arm/mach-kirkwood/board-dt.c
+++ b/arch/arm/mach-kirkwood/board-dt.c
@@ -87,6 +87,7 @@
 	 */
 	writel(readl(CPU_CONFIG) & ~CPU_CONFIG_ERROR_PROP, CPU_CONFIG);
 
+	BUG_ON(mvebu_mbus_dt_init());
 	kirkwood_setup_wins();
 
 	kirkwood_l2_init();