mosys: Support mistral get brand

Support mosys platform brand

BUG=b:123915897
TEST=build mosys and run on mistral

Change-Id: Icf5cf6ecaadf6949036aa514c6198071a6b40566
Reviewed-on: https://chromium-review.googlesource.com/1478019
Commit-Ready: Zheng Pan <zhengpan@chromium.org>
Tested-by: Zheng Pan <zhengpan@chromium.org>
Tested-by: Yuji Sasaki <sasakiy@chromium.org>
Reviewed-by: Zheng Pan <zhengpan@chromium.org>
Reviewed-by: Chinyue Chen <chinyue@chromium.org>
Reviewed-by: Yuji Sasaki <sasakiy@chromium.org>
1 file changed