POST PPC4xx/spr IVPR only if PPC440

The SPR IVPR register is only present (as far as I know) for
processors with a PPC440 core.

Signed-off-by: Niklaus Giger <niklaus.giger@netstal.com>
Acked-by: Stefan Roese <sr@denx.de>

post/cpu/ppc4xx/spr.c

@@ -76,7 +76,9 @@ static struct {
 	{0x3b,	"CSRR1",	0x00000000,	0x00000000},
 	{0x3d,	"DEAR",		0x00000000,	0x00000000},
 	{0x3e,	"ESR",		0x00000000,	0x00000000},
+#ifdef CONFIG_440
 	{0x3f,	"IVPR",		0xffff0000,	0x00000000},
+#endif
 	{0x100,	"USPRG0",	0x00000000,	0x00000000},
 	{0x104,	"SPRG4",	0x00000000,	0x00000000},
 	{0x105,	"SPRG5",	0x00000000,	0x00000000},