ppc4xx: Cleanup some HW register names

Here you find all the changes in the include directory for new register names
and adapting other ones to the names used by AMCC in their manuals, e.g.
For 440EPx/GRPPC440EPx/GRX, Revision 1.15 – September 22, 2008
For PPC405GP Embedded Processor, Revision 1.02 – March 22, 2006

Signed-off-by: Niklaus Giger <niklaus.giger@member.fsf.org>
Signed-off-by: Stefan Roese <sr@denx.de>
diff --git a/include/4xx_i2c.h b/include/4xx_i2c.h
index f0e772c..070657f 100644
--- a/include/4xx_i2c.h
+++ b/include/4xx_i2c.h
@@ -63,7 +63,7 @@
 #define IIC_EXTSTS	(I2C_REGISTERS_BASE_ADDRESS+IICEXTSTS)
 #define IIC_LSADR	(I2C_REGISTERS_BASE_ADDRESS+IICLSADR)
 #define IIC_HSADR	(I2C_REGISTERS_BASE_ADDRESS+IICHSADR)
-#define IIC_CLKDIV	(I2C_REGISTERS_BASE_ADDRESS+IICCLKDIV)
+#define IIC_CLKDIV	(I2C_REGISTERS_BASE_ADDRESS+IIC0_CLKDIV)
 #define IIC_INTRMSK	(I2C_REGISTERS_BASE_ADDRESS+IICINTRMSK)
 #define IIC_XFRCNT	(I2C_REGISTERS_BASE_ADDRESS+IICXFRCNT)
 #define IIC_XTCNTLSS	(I2C_REGISTERS_BASE_ADDRESS+IICXTCNTLSS)