arm/mx2: use per-SOC nand device

The previous commit introduced one nand device per SoC.  Use this
directly instead of the compatibility macro that will break for
multi-SoC kernels.  And while at it remove the compatibility macro now
that all in-tree users are fixed.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
diff --git a/arch/arm/mach-mx2/mach-mx27ads.c b/arch/arm/mach-mx2/mach-mx27ads.c
index 808ca27..721f5c7 100644
--- a/arch/arm/mach-mx2/mach-mx27ads.c
+++ b/arch/arm/mach-mx2/mach-mx27ads.c
@@ -290,7 +290,7 @@
 	mxc_register_device(&mxc_uart_device3, &uart_pdata[3]);
 	mxc_register_device(&mxc_uart_device4, &uart_pdata[4]);
 	mxc_register_device(&mxc_uart_device5, &uart_pdata[5]);
-	mxc_register_device(&mxc_nand_device, &mx27ads_nand_board_info);
+	mxc_register_device(&imx27_nand_device, &mx27ads_nand_board_info);
 
 	/* only the i2c master 1 is used on this CPU card */
 	i2c_register_board_info(1, mx27ads_i2c_devices,