dma: mxs-dma: make platform_device_id more generic

Rewrite mxs_dma_is_apbh and mxs_dma_is_apbx in order to support
other SoCs like imx6q and reform the platform_device_id for the
better further dt support.

Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Sascha Hauer <s.hauer@pengutronix.de>
Cc: Huang Shijie <b32955@freescale.com>
Signed-off-by: Dong Aisheng <dong.aisheng@linaro.org>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Acked-by: Marek Vasut <marex@denx.de>
Acked-by: Vinod Koul <vinod.koul@intel.com>

drivers/clk/mxs/clk-imx28.c

@@ -136,14 +136,14 @@ static struct clk_lookup uart_lookups[] __initdata = {
 };
 
 static struct clk_lookup hbus_lookups[] __initdata = {
-	{ .dev_id = "mxs-dma-apbh", },
+	{ .dev_id = "imx28-dma-apbh", },
 	{ .dev_id = "80004000.dma-apbh", },
 };
 
 static struct clk_lookup xbus_lookups[] __initdata = {
 	{ .dev_id = "duart", .con_id = "apb_pclk"},
 	{ .dev_id = "80074000.serial", .con_id = "apb_pclk"},
-	{ .dev_id = "mxs-dma-apbx", },
+	{ .dev_id = "imx28-dma-apbx", },
 	{ .dev_id = "80024000.dma-apbx", },
 };