[POWERPC] 4xx: Adds decoding of 440SPE memory size to boot wrapper library

This adds a function to the bootwrapper 4xx library to decode memory
size on 440SPE processors.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
diff --git a/arch/powerpc/boot/treeboot-walnut.c b/arch/powerpc/boot/treeboot-walnut.c
index 330485f..472e366 100644
--- a/arch/powerpc/boot/treeboot-walnut.c
+++ b/arch/powerpc/boot/treeboot-walnut.c
@@ -63,7 +63,7 @@
 #define WALNUT_OPENBIOS_MAC_OFF 0xfffffe0b
 static void walnut_fixups(void)
 {
-	ibm4xx_fixup_memsize();
+	ibm4xx_sdram_fixup_memsize();
 	ibm405gp_fixup_clocks(33330000, 0xa8c000);
 	ibm4xx_quiesce_eth((u32 *)0xef600800, NULL);
 	ibm4xx_fixup_ebc_ranges("/plb/ebc");