mmc: mxcmmc: 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>
Acked-by: Sascha Hauer <s.hauer@pengutronix.de>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Chris Ball <cjb@laptop.org>
Tested-by: Javier Martin <javier.martin@vista-silicon.com>
Cc: linux-mmc@vger.kernel.org
diff --git a/arch/arm/mach-imx/clk-imx31.c b/arch/arm/mach-imx/clk-imx31.c
index d9ff16e..1277f73 100644
--- a/arch/arm/mach-imx/clk-imx31.c
+++ b/arch/arm/mach-imx/clk-imx31.c
@@ -159,8 +159,8 @@
 	clk_register_clkdev(clk[i2c2_gate], NULL, "imx21-i2c.1");
 	clk_register_clkdev(clk[i2c3_gate], NULL, "imx21-i2c.2");
 	clk_register_clkdev(clk[owire_gate], NULL, "mxc_w1.0");
-	clk_register_clkdev(clk[sdhc1_gate], NULL, "mxc-mmc.0");
-	clk_register_clkdev(clk[sdhc2_gate], NULL, "mxc-mmc.1");
+	clk_register_clkdev(clk[sdhc1_gate], NULL, "imx31-mmc.0");
+	clk_register_clkdev(clk[sdhc2_gate], NULL, "imx31-mmc.1");
 	clk_register_clkdev(clk[ssi1_gate], NULL, "imx-ssi.0");
 	clk_register_clkdev(clk[ssi2_gate], NULL, "imx-ssi.1");
 	clk_register_clkdev(clk[firi_gate], "firi", NULL);