[ARM] MX27 Clock rework

This changes MX27 to use common clkdev. It also cleans up MX27 clock
support to be more readable.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

arch/arm/mach-mx2/cpu_imx27.c

@@ -26,11 +26,11 @@
 
 #include <mach/hardware.h>
 
-#include "crm_regs.h"
-
 static int cpu_silicon_rev = -1;
 static int cpu_partnumber;
 
+#define SYS_CHIP_ID             0x00    /* The offset of CHIP ID register */
+
 static void query_silicon_parameter(void)
 {
 	u32 val;

arch/arm/plat-mxc/Kconfig

@@ -15,6 +15,7 @@ config ARCH_MX1
 config ARCH_MX2
 	bool "MX2-based"
 	select CPU_ARM926T
+	select COMMON_CLKDEV
 	help
 	  This enables support for systems based on the Freescale i.MX2 family