dragonboards: Add support for upstream mesa/main vulkan

Patch completely suggested by Roman Stratiienko (many thanks!)

This patch enables config options needed to get vulkan
working using the upstream mesa/main branch.

Signed-off-by: John Stultz <john.stultz@linaro.org>
Change-Id: I762436a5dc7403674eae5b20b6da1548805a7271
2 files changed