zynq: Provide a framework to read clock frequencies

Signed-off-by: Soren Brinkmann <soren.brinkmann@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
diff --git a/arch/arm/cpu/armv7/zynq/Makefile b/arch/arm/cpu/armv7/zynq/Makefile
index d382d49..3374789 100644
--- a/arch/arm/cpu/armv7/zynq/Makefile
+++ b/arch/arm/cpu/armv7/zynq/Makefile
@@ -12,3 +12,4 @@
 obj-y	+= cpu.o
 obj-y	+= ddrc.o
 obj-y	+= slcr.o
+obj-y	+= clk.o