v3dv: initialize CL submission structure
This fixes an issue related with testing this with a kernel with the performance counters enabled: it introduces a "pad" field that in the CL submission structure that is not initialized. Fixes: ca138680 ("drm-uapi: add v3d performance counters") Reviewed-by:Alejandro Piñeiro <apinheiro@igalia.com> Signed-off-by:
Juan A. Suarez Romero <jasuarez@igalia.com> Part-of: <mesa/mesa!12390>