Consolidate mpc8260 linker scripts

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
diff --git a/board/cogent/config.mk b/board/cogent/config.mk
index ee77939..35a5ed3 100644
--- a/board/cogent/config.mk
+++ b/board/cogent/config.mk
@@ -29,3 +29,5 @@
 TEXT_BASE = 0xfff00000
 
 PLATFORM_CPPFLAGS += -DTEXT_BASE=$(TEXT_BASE) -I$(TOPDIR)
+
+LDSCRIPT := $(SRCTREE)/board/cogent/u-boot.lds