Merge "db845c.mk: set DB845C_KERNEL_DIR to use environment when specified" am: fe771fcdfb am: 2ae5a2a2e6 am: 1773525b62

Original change: https://android-review.googlesource.com/c/device/linaro/dragonboard/+/1462043

Change-Id: Idc1c2f98c507669886e8b9f404b09e53b10ac2d2