ppc4xx: Big cleanup of PPC4xx defines

This patch cleans up multiple issues of the 4xx register (mostly
DCR, SDR, CPR, etc) definitions:

- Change lower case defines to upper case (plb4_acr -> PLB4_ACR)
- Change the defines to better match the names from the
  user's manuals (e.g. cprpllc -> CPR0_PLLC)
- Removal of some unused defines

Please test this patch intensive on your PPC4xx platform. Even though
I tried not to break anything and tested successfully on multiple
4xx AMCC platforms, testing on custom platforms is recommended.

Signed-off-by: Stefan Roese <sr@denx.de>
diff --git a/board/w7o/w7o.c b/board/w7o/w7o.c
index 22cdfcd..6479bee 100644
--- a/board/w7o/w7o.c
+++ b/board/w7o/w7o.c
@@ -170,17 +170,17 @@
 	int size = 0;
 
 	/* Get bank Size registers */
-	mtdcr (memcfga, mem_mb0cf);	/* get bank 0 config reg */
-	regs[0] = mfdcr (memcfgd);
+	mtdcr (SDRAM0_CFGADDR, mem_mb0cf);	/* get bank 0 config reg */
+	regs[0] = mfdcr (SDRAM0_CFGDATA);
 
-	mtdcr (memcfga, mem_mb1cf);	/* get bank 1 config reg */
-	regs[1] = mfdcr (memcfgd);
+	mtdcr (SDRAM0_CFGADDR, mem_mb1cf);	/* get bank 1 config reg */
+	regs[1] = mfdcr (SDRAM0_CFGDATA);
 
-	mtdcr (memcfga, mem_mb2cf);	/* get bank 2 config reg */
-	regs[2] = mfdcr (memcfgd);
+	mtdcr (SDRAM0_CFGADDR, mem_mb2cf);	/* get bank 2 config reg */
+	regs[2] = mfdcr (SDRAM0_CFGDATA);
 
-	mtdcr (memcfga, mem_mb3cf);	/* get bank 3 config reg */
-	regs[3] = mfdcr (memcfgd);
+	mtdcr (SDRAM0_CFGADDR, mem_mb3cf);	/* get bank 3 config reg */
+	regs[3] = mfdcr (SDRAM0_CFGDATA);
 
 	/* compute the size, add each bank if enabled */
 	for (i = 0; i < 4; i++) {