db845c/rb5: Switch to android-6.1 as the default kernel version am: 7652f47a76

Original change: https://android-review.googlesource.com/c/device/linaro/dragonboard/+/2619251

Change-Id: I0aa4da45577dcdc27ad9e51a0614074bcab25781
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>