IMX: introduce clock API

This patch introduces the clock API for i.MX and converts all
in-Kernel drivers to use it.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

diff --git a/arch/arm/mach-imx/Makefile b/arch/arm/mach-imx/Makefile
index 88d5e61..b047c7e 100644
--- a/arch/arm/mach-imx/Makefile
+++ b/arch/arm/mach-imx/Makefile
@@ -4,7 +4,7 @@
 
 # Object file lists.
 
-obj-y			+= irq.o time.o dma.o generic.o
+obj-y			+= irq.o time.o dma.o generic.o clock.o
 
 obj-$(CONFIG_CPU_FREQ_IMX)	+= cpufreq.o