Consolidate mpc5xxx linker scripts

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
diff --git a/board/hmi1001/config.mk b/board/hmi1001/config.mk
index 51e8e84c..4fe1831 100644
--- a/board/hmi1001/config.mk
+++ b/board/hmi1001/config.mk
@@ -39,3 +39,4 @@
 endif
 
 PLATFORM_CPPFLAGS += -DTEXT_BASE=$(TEXT_BASE) -I$(TOPDIR)/board
+LDSCRIPT := $(SRCTREE)/cpu/mpc5xxx/u-boot-customlayout.lds
diff --git a/board/inka4x0/config.mk b/board/inka4x0/config.mk
index cb19a7d..fc70efe 100644
--- a/board/inka4x0/config.mk
+++ b/board/inka4x0/config.mk
@@ -39,3 +39,4 @@
 endif
 
 PLATFORM_CPPFLAGS += -DTEXT_BASE=$(TEXT_BASE) -I$(TOPDIR)/board
+LDSCRIPT := $(SRCTREE)/cpu/mpc5xxx/u-boot-customlayout.lds
diff --git a/board/uc101/config.mk b/board/uc101/config.mk
index 51e8e84c..4fe1831 100644
--- a/board/uc101/config.mk
+++ b/board/uc101/config.mk
@@ -39,3 +39,4 @@
 endif
 
 PLATFORM_CPPFLAGS += -DTEXT_BASE=$(TEXT_BASE) -I$(TOPDIR)/board
+LDSCRIPT := $(SRCTREE)/cpu/mpc5xxx/u-boot-customlayout.lds