video: imxfb: 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>
Cc: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Cc: linux-fbdev@vger.kernel.org
diff --git a/arch/arm/mach-imx/clk-imx27.c b/arch/arm/mach-imx/clk-imx27.c
index 46764d8..4204092 100644
--- a/arch/arm/mach-imx/clk-imx27.c
+++ b/arch/arm/mach-imx/clk-imx27.c
@@ -221,9 +221,9 @@
 	clk_register_clkdev(clk[cspi1_ipg_gate], NULL, "imx27-cspi.0");
 	clk_register_clkdev(clk[cspi2_ipg_gate], NULL, "imx27-cspi.1");
 	clk_register_clkdev(clk[cspi3_ipg_gate], NULL, "imx27-cspi.2");
-	clk_register_clkdev(clk[per3_gate], "per", "imx-fb.0");
-	clk_register_clkdev(clk[lcdc_ipg_gate], "ipg", "imx-fb.0");
-	clk_register_clkdev(clk[lcdc_ahb_gate], "ahb", "imx-fb.0");
+	clk_register_clkdev(clk[per3_gate], "per", "imx21-fb.0");
+	clk_register_clkdev(clk[lcdc_ipg_gate], "ipg", "imx21-fb.0");
+	clk_register_clkdev(clk[lcdc_ahb_gate], "ahb", "imx21-fb.0");
 	clk_register_clkdev(clk[csi_ahb_gate], "ahb", "imx27-camera.0");
 	clk_register_clkdev(clk[usb_div], "per", "fsl-usb2-udc");
 	clk_register_clkdev(clk[usb_ipg_gate], "ipg", "fsl-usb2-udc");