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/README b/README
index 5c907c8..d03862b 100644
--- a/README
+++ b/README
@@ -1342,6 +1342,17 @@
 
 		will skip addresses 0x50 and 0x68 on bus 0 and address 0x54 on bus 1
 
+		CFG_SPD_BUS_NUM
+
+		If defined, then this indicates the I2C bus number for DDR SPD.
+		If not defined, then U-Boot assumes that SPD is on I2C bus 0.
+
+		CONFIG_FSL_I2C
+
+		Define this option if you want to use Freescale's I2C driver in
+		drivers/fsl_i2c.c.
+
+
 - SPI Support:	CONFIG_SPI
 
 		Enables SPI driver (so far only tested with