ARM:AM33XX: Add clock definitions

This patch adds basic clock definition of am33xx SoC.

Signed-off-by: Chandan Nath <chandan.nath@ti.com>
Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>
diff --git a/arch/arm/cpu/armv7/am33xx/Makefile b/arch/arm/cpu/armv7/am33xx/Makefile
index 498df78..fc25587 100644
--- a/arch/arm/cpu/armv7/am33xx/Makefile
+++ b/arch/arm/cpu/armv7/am33xx/Makefile
@@ -18,6 +18,7 @@
 
 SOBJS	:= lowlevel_init.o
 
+COBJS	+= clock.o
 COBJS	+= sys_info.o
 
 SRCS	:= $(SOBJS:.o=.S) $(COBJS:.o=.c)