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/esd/ar405/flash.c b/board/esd/ar405/flash.c
index 274ada9..a53122b 100644
--- a/board/esd/ar405/flash.c
+++ b/board/esd/ar405/flash.c
@@ -65,9 +65,9 @@
 	flash_get_offsets (-size_b0, &flash_info[0]);
 
 	/* Re-do sizing to get full correct info */
-	mtdcr(ebccfga, pb0cr);
-	pbcr = mfdcr(ebccfgd);
-	mtdcr(ebccfga, pb0cr);
+	mtdcr(EBC0_CFGADDR, PB0CR);
+	pbcr = mfdcr(EBC0_CFGDATA);
+	mtdcr(EBC0_CFGADDR, PB0CR);
 	base_b0 = -size_b0;
 	switch (size_b0) {
 	case 1 << 20:
@@ -87,7 +87,7 @@
 		break;
 	}
 	pbcr = (pbcr & 0x0001ffff) | base_b0 | (size_val << 17);
-	mtdcr(ebccfgd, pbcr);
+	mtdcr(EBC0_CFGDATA, pbcr);
 
 	/* Monitor protection ON by default */
 	(void)flash_protect(FLAG_PROTECT_SET,