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/eric/flash.c b/board/eric/flash.c
index 7e57513..fded412 100644
--- a/board/eric/flash.c
+++ b/board/eric/flash.c
@@ -105,24 +105,24 @@
 
 	    if (size_b1)
 	      {
-		mtdcr(ebccfga, pb0cr);
-		pbcr = mfdcr(ebccfgd);
-		mtdcr(ebccfga, pb0cr);
+		mtdcr(EBC0_CFGADDR, PB0CR);
+		pbcr = mfdcr(EBC0_CFGDATA);
+		mtdcr(EBC0_CFGADDR, PB0CR);
 		base_b1 = -size_b1;
 		pbcr = (pbcr & 0x0001ffff) | base_b1 | (((size_b1/1024/1024)-1)<<17);
-		mtdcr(ebccfgd, pbcr);
-		/*          printf("pb1cr = %x\n", pbcr); */
+		mtdcr(EBC0_CFGDATA, pbcr);
+		/*          printf("PB1CR = %x\n", pbcr); */
 	      }
 
 	    if (size_b0)
 	      {
-		mtdcr(ebccfga, pb1cr);
-		pbcr = mfdcr(ebccfgd);
-		mtdcr(ebccfga, pb1cr);
+		mtdcr(EBC0_CFGADDR, PB1CR);
+		pbcr = mfdcr(EBC0_CFGDATA);
+		mtdcr(EBC0_CFGADDR, PB1CR);
 		base_b0 = base_b1 - size_b0;
 		pbcr = (pbcr & 0x0001ffff) | base_b0 | (((size_b0/1024/1024)-1)<<17);
-		mtdcr(ebccfgd, pbcr);
-		/*            printf("pb0cr = %x\n", pbcr); */
+		mtdcr(EBC0_CFGDATA, pbcr);
+		/*            printf("PB0CR = %x\n", pbcr); */
 	      }
 
 	    size_b0 = flash_get_size((volatile FLASH_WORD_SIZE *)base_b0, &flash_info[0]);