Conditionally perform common relocation fixups

Add #ifdefs where necessary to not perform relocation fixups.  This
allows boards/architectures which support relocation to trim a decent
chunk of code.

Note that this patch doesn't add #ifdefs to architecture-specific code
which does not support relocation.

Signed-off-by: Peter Tyser <ptyser@xes-inc.com>
diff --git a/disk/part.c b/disk/part.c
index b92fb45..9ced452 100644
--- a/disk/part.c
+++ b/disk/part.c
@@ -80,7 +80,10 @@
 	block_dev_desc_t* (*reloc_get_dev)(int dev);
 
 	while (drvr->name) {
-		reloc_get_dev = drvr->get_dev + gd->reloc_off;
+		reloc_get_dev = drvr->get_dev;
+#ifndef CONFIG_RELOC_FIXUP_WORKS
+		reloc_get_dev += gd->reloc_off;
+#endif
 		if (strncmp(ifname, drvr->name, strlen(drvr->name)) == 0)
 			return reloc_get_dev(dev);
 		drvr++;