dma: imx-dma: remove cpu_is_xxx by using platform_device_id

It changes the driver to use platform_device_id rather than cpu_is_xxx
to determine the controller type, and updates the platform code
accordingly.

As the result, mach/hardware.h inclusion gets removed from the driver.

Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Tested-by: Javier Martin <javier.martin@vista-silicon.com>
Cc: Vinod Koul <vinod.koul@linux.intel.com>
diff --git a/arch/arm/mach-imx/mm-imx1.c b/arch/arm/mach-imx/mm-imx1.c
index 9de81bf..79f6c0b 100644
--- a/arch/arm/mach-imx/mm-imx1.c
+++ b/arch/arm/mach-imx/mm-imx1.c
@@ -60,6 +60,7 @@
 						MX1_GPIO_INT_PORTC, 0);
 	mxc_register_gpio("imx1-gpio", 3, MX1_GPIO4_BASE_ADDR, SZ_256,
 						MX1_GPIO_INT_PORTD, 0);
-	imx_add_imx_dma(MX1_DMA_BASE_ADDR, MX1_DMA_INT, MX1_DMA_ERR);
+	imx_add_imx_dma("imx1-dma", MX1_DMA_BASE_ADDR,
+			MX1_DMA_INT, MX1_DMA_ERR);
 	pinctrl_provide_dummies();
 }