ppc4xx: Big header cleanup, mostly PPC440 related

This patch starts a bit PPC4xx header cleanup. First patch mostly
touches PPC440 files. A later patch will touch the PPC405 files as well.

This cleanup is done by creating header files for all SoC versions and
moving the SoC specific defines into these special headers. This way the
common header ppc405.h and ppc440.h can be cleaned up finally.

Signed-off-by: Stefan Roese <sr@denx.de>
diff --git a/board/esd/du440/du440.c b/board/esd/du440/du440.c
index fccfaee..426321e 100644
--- a/board/esd/du440/du440.c
+++ b/board/esd/du440/du440.c
@@ -265,8 +265,8 @@
 	 * This fix will make the MAL burst disabling patch for the Linux
 	 * EMAC driver obsolete.
 	 */
-	reg = mfdcr(PLB4_ACR) & ~PLB4_ACR_WRP;
-	mtdcr(PLB4_ACR, reg);
+	reg = mfdcr(PLB4A0_ACR) & ~PLB4Ax_ACR_WRP_MASK;
+	mtdcr(PLB4A0_ACR, reg);
 
 	/*
 	 * release IO-RST#
diff --git a/board/esd/pci405/pci405.c b/board/esd/pci405/pci405.c
index dd97c7a..4018a7d 100644
--- a/board/esd/pci405/pci405.c
+++ b/board/esd/pci405/pci405.c
@@ -281,7 +281,6 @@
 #define PCI0_BRDGOPT1 0x4a
 	pci_write_config_word(PCIDEVID_405GP, PCI0_BRDGOPT1, 0x3f20);
 
-#define PLB0_ACR      0x87
 	/*
 	 * Enable fairness and high bus utilization
 	 */
diff --git a/board/esd/pmc440/pmc440.c b/board/esd/pmc440/pmc440.c
index c907b85..8238c33 100644
--- a/board/esd/pmc440/pmc440.c
+++ b/board/esd/pmc440/pmc440.c
@@ -426,8 +426,8 @@
 	 * This fix will make the MAL burst disabling patch for the Linux
 	 * EMAC driver obsolete.
 	 */
-	reg = mfdcr(PLB4_ACR) & ~PLB4_ACR_WRP;
-	mtdcr(PLB4_ACR, reg);
+	reg = mfdcr(PLB4A0_ACR) & ~PLB4Ax_ACR_WRP_MASK;
+	mtdcr(PLB4A0_ACR, reg);
 
 #ifdef CONFIG_FPGA
 	pmc440_init_fpga();