drm/msm: Small uabi fixes

Correct the minor version exposed and error return value for
MSM_INFO_GET_NAME.

Signed-off-by: Rob Clark <robdclark@chromium.org>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Patchwork: https://patchwork.freedesktop.org/patch/566155/