powerpc/83xx: move km 83xx specific i2c code to km83xx_i2c

The common code should be valid for more than one architecture.
Therefore this code was reorganized and moved to the new
file km83xx_i2c.c

Signed-off-by: Holger Brunck <holger.brunck@keymile.com>
Signed-off-by: Kim Phillips <kim.phillips@freescale.com>
diff --git a/board/keymile/km83xx/Makefile b/board/keymile/km83xx/Makefile
index 72945e2..472768a 100644
--- a/board/keymile/km83xx/Makefile
+++ b/board/keymile/km83xx/Makefile
@@ -28,7 +28,7 @@
 
 LIB	= $(obj)lib$(BOARD).o
 
-COBJS	+= $(BOARD).o ../common/common.o ../common/ivm.o
+COBJS	+= $(BOARD).o ../common/common.o ../common/ivm.o $(BOARD)_i2c.o
 
 SRCS	:= $(SOBJS:.o=.S) $(COBJS:.o=.c)
 OBJS	:= $(addprefix $(obj),$(COBJS))