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/amcc/taihu/taihu.c b/board/amcc/taihu/taihu.c
index d8806ac..4e5796e 100644
--- a/board/amcc/taihu/taihu.c
+++ b/board/amcc/taihu/taihu.c
@@ -48,14 +48,14 @@
 	mtdcr(uicsr, 0xFFFFFFFF);	/* clear all ints */
 	mtdcr(uicvcr, 0x00000001);	/* set vect base=0,INT0 highest priority */
 
-	mtebc(pb3ap, CONFIG_SYS_EBC_PB3AP);	/* memory bank 3 (CPLD_LCM) initialization */
-	mtebc(pb3cr, CONFIG_SYS_EBC_PB3CR);
+	mtebc(PB3AP, CONFIG_SYS_EBC_PB3AP);	/* memory bank 3 (CPLD_LCM) initialization */
+	mtebc(PB3CR, CONFIG_SYS_EBC_PB3CR);
 
 	/*
 	 * Configure CPC0_PCI to enable PerWE as output
 	 * and enable the internal PCI arbiter
 	 */
-	mtdcr(cpc0_pci, CPC0_PCI_SPE | CPC0_PCI_HOST_CFG_EN | CPC0_PCI_ARBIT_EN);
+	mtdcr(CPC0_PCI, CPC0_PCI_SPE | CPC0_PCI_HOST_CFG_EN | CPC0_PCI_ARBIT_EN);
 
 	return 0;
 }