This is needed for the definition of $(LINUX_DIR). This is used in
u-boot.mk to change the device-tree compiler to the dtc used by
linux.
Without this, the build will use the system dtc. This results in a
build failure when a dtc does not exist outside the buildroot.
Signed-off-by: Alexandru Gagniuc <alex.g@adaptrum.com>
Alexandru Gagniuc