ARM: mxs: add initial device tree support for imx23-evk board

It adds initial device tree support for imx23-evk board, and only
serial console is enabled.

Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Acked-by: Marek Vasut <marex@denx.de>

drivers/clk/mxs/clk-imx23.c

@@ -87,6 +87,7 @@ static struct clk_lookup hbus_lookups[] __initdata = {
 
 static struct clk_lookup xbus_lookups[] __initdata = {
 	{ .dev_id = "duart", .con_id = "apb_pclk"},
+	{ .dev_id = "80070000.serial", .con_id = "apb_pclk"},
 	{ .dev_id = "mxs-dma-apbx", },
 	{ .dev_id = "80024000.dma-apbx", },
 };