ppc4xx: Consolidate some of the 405 and 440 macros/structs into 4xx

This patch moves some common 4xx macros and the PPC405_SYS_INFO/
PPC440_SYS_INFO structure into the common ppc4xx.h header.

Lot's of other macros are good candidates to be consolidated this way
in the future.

Signed-off-by: Stefan Roese <sr@denx.de>
diff --git a/board/amcc/taishan/showinfo.c b/board/amcc/taishan/showinfo.c
index 57b9d1c..040b800 100644
--- a/board/amcc/taishan/showinfo.c
+++ b/board/amcc/taishan/showinfo.c
@@ -33,25 +33,25 @@
 
 	/* read clock regsiter */
 	printf("===== Display reset and initialize register Start =========\n");
-	mfclk(clk_pllc,reg);
+	mfcpr(clk_pllc,reg);
 	printf("cpr_pllc   = %#010x\n",reg);
 
-	mfclk(clk_plld,reg);
+	mfcpr(clk_plld,reg);
 	printf("cpr_plld   = %#010x\n",reg);
 
-	mfclk(clk_primad,reg);
+	mfcpr(clk_primad,reg);
 	printf("cpr_primad = %#010x\n",reg);
 
-	mfclk(clk_primbd,reg);
+	mfcpr(clk_primbd,reg);
 	printf("cpr_primbd = %#010x\n",reg);
 
-	mfclk(clk_opbd,reg);
+	mfcpr(clk_opbd,reg);
 	printf("cpr_opbd   = %#010x\n",reg);
 
-	mfclk(clk_perd,reg);
+	mfcpr(clk_perd,reg);
 	printf("cpr_perd   = %#010x\n",reg);
 
-	mfclk(clk_mald,reg);
+	mfcpr(clk_mald,reg);
 	printf("cpr_mald   = %#010x\n",reg);
 
 	/* read sdr register */