mpc83xx: Update 83xx to use fsl_i2c.c

Update the 83xx tree to use I2C support in drivers/fsl_i2c.c.  Delete
cpu/mpc83xx/i2c.c, include/asm-ppc/i2c.h, and all references to those files.
Added multiple I2C bus support to fsl_i2c.c.

Signed-off-by: Timur Tabi <timur@freescale.com>
diff --git a/cpu/mpc83xx/Makefile b/cpu/mpc83xx/Makefile
index e254ef9..4b9dcc8 100644
--- a/cpu/mpc83xx/Makefile
+++ b/cpu/mpc83xx/Makefile
@@ -29,7 +29,7 @@
 
 START	= start.o
 COBJS	= traps.o cpu.o cpu_init.o speed.o interrupts.o \
-	  i2c.o spd_sdram.o qe_io.o
+	  spd_sdram.o qe_io.o
 
 SRCS	:= $(START:.o=.S) $(SOBJS:.o=.S) $(COBJS:.o=.c)
 OBJS	:= $(addprefix $(obj),$(SOBJS) $(COBJS))