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/pmc405/pmc405.c b/board/esd/pmc405/pmc405.c
index 192a642..5ff87e7 100644
--- a/board/esd/pmc405/pmc405.c
+++ b/board/esd/pmc405/pmc405.c
@@ -60,12 +60,12 @@
 	 * EBC Configuration Register:
 	 * set ready timeout to 512 ebc-clks -> ca. 15 us
 	 */
-	mtebc (epcr, 0xa8400000);
+	mtebc (EBC0_CFG, 0xa8400000);
 
 	/*
 	 * Setup GPIO pins
 	 */
-	mtdcr(cntrl0, mfdcr(cntrl0) | ((CONFIG_SYS_FPGA_INIT |
+	mtdcr(CPC0_CR0, mfdcr(CPC0_CR0) | ((CONFIG_SYS_FPGA_INIT |
 					CONFIG_SYS_FPGA_DONE |
 					CONFIG_SYS_XEREADY |
 					CONFIG_SYS_NONMONARCH |
@@ -73,7 +73,7 @@
 
 	if (!(in_be32((void *)GPIO0_IR) & CONFIG_SYS_REV1_2)) {
 		/* rev 1.2 boards */
-		mtdcr(cntrl0, mfdcr(cntrl0) | ((CONFIG_SYS_INTA_FAKE |
+		mtdcr(CPC0_CR0, mfdcr(CPC0_CR0) | ((CONFIG_SYS_INTA_FAKE |
 						CONFIG_SYS_SELF_RST) << 5));
 	}