ppc_4xx: Fix post spr.c for PPC405

post/cpu/ppc4xx/spr.c contained a few checks for registers only present
for PPC440 and derivates processor.

Signed-off-by: Niklaus Giger <niklaus.giger@netstal.com>
diff --git a/post/cpu/ppc4xx/spr.c b/post/cpu/ppc4xx/spr.c
index 3e74634..c12e378 100644
--- a/post/cpu/ppc4xx/spr.c
+++ b/post/cpu/ppc4xx/spr.c
@@ -80,7 +80,9 @@
 	{0x107,	"SPRG7",	0x00000000,	0x00000000},
 	{0x10c,	"TBL",		0x00000000,	0x00000000},
 	{0x10d,	"TBU",		0x00000000,	0x00000000},
+#ifdef CONFIG_440
 	{0x11e,	"PIR",		0x0000000f,	0x00000000},
+#endif
 	{0x130,	"DBSR",		0x00000000,	0x00000000},
 	{0x134,	"DBCR0",	0x00000000,	0x00000000},
 	{0x135,	"DBCR1",	0x00000000,	0x00000000},
@@ -95,6 +97,7 @@
 	{0x13f,	"DVC2",		0x00000000,	0x00000000},
 	{0x150,	"TSR",		0x00000000,	0x00000000},
 	{0x154,	"TCR",		0x00000000,	0x00000000},
+#ifdef CONFIG_440
 	{0x190,	"IVOR0",	0x0000fff0,	0x00000100},
 	{0x191,	"IVOR1",	0x0000fff0,	0x00000200},
 	{0x192,	"IVOR2",	0x0000fff0,	0x00000300},
@@ -111,6 +114,7 @@
 	{0x19d,	"IVOR13",	0x0000fff0,	0x00001300},
 	{0x19e,	"IVOR14",	0x0000fff0,	0x00001400},
 	{0x19f,	"IVOR15",	0x0000fff0,	0x00002000},
+#endif
 	{0x23a,	"MCSRR0",	0x00000000,	0x00000000},
 	{0x23b,	"MCSRR1",	0x00000000,	0x00000000},
 	{0x23c,	"MCSR",		0x00000000,	0x00000000},
@@ -131,8 +135,10 @@
 	{0x395,	"DTV1",		0x00000000,	0x00000000},
 	{0x396,	"DTV2",		0x00000000,	0x00000000},
 	{0x397,	"DTV3",		0x00000000,	0x00000000},
+#ifdef CONFIG_440
 	{0x398,	"DVLIM",	0x0fc1f83f,	0x0001f800},
 	{0x399,	"IVLIM",	0x0fc1f83f,	0x0001f800},
+#endif
 	{0x39b,	"RSTCFG",	0x00000000,	0x00000000},
 	{0x39c,	"DCDBTRL",	0x00000000,	0x00000000},
 	{0x39d,	"DCDBTRH",	0x00000000,	0x00000000},