Consolidate mpc824x linker scripts

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
diff --git a/cpu/mpc824x/config.mk b/cpu/mpc824x/config.mk
index dac61d8..66207f4 100644
--- a/cpu/mpc824x/config.mk
+++ b/cpu/mpc824x/config.mk
@@ -24,3 +24,6 @@
 PLATFORM_RELFLAGS += -fPIC -ffixed-r14 -meabi -fno-strict-aliasing
 
 PLATFORM_CPPFLAGS += -DCONFIG_MPC824X -ffixed-r2 -ffixed-r29 -mstring -mcpu=603e -msoft-float
+
+# Use default linker script.  Board port can override in board/*/config.mk
+LDSCRIPT := $(SRCTREE)/cpu/mpc824x/u-boot.lds