db410c: update wlan and bt mac addresses from firmware

The firmware that runs before u-boot modifies u-boot's device tree
adding the local-mac-address and local-bd-address properties for the
compatibles "qcom,wcnss-bt" and "qcom,wcnss-wlan".

This commit reads that firmware, retrieves the properties and fixups
the device tree that is passed to the kernel before booting.

Signed-off-by: Jorge Ramirez-Ortiz <jorge.ramirez-ortiz@linaro.org>
diff --git a/board/qualcomm/dragonboard410c/Makefile b/board/qualcomm/dragonboard410c/Makefile
index cd67808..5082383 100644
--- a/board/qualcomm/dragonboard410c/Makefile
+++ b/board/qualcomm/dragonboard410c/Makefile
@@ -5,4 +5,5 @@
 #
 
 obj-y	:= dragonboard410c.o
+obj-y	+= lowlevel_init.o
 extra-y += head.o