gallium: properly propagate the usage of resource
What does this MR do and why?
gallium: properly propagate the usage of resource
In case that some drivers might make decision depending on it,
it is better to tell drivers about usage of resource just like
in `blit_to_staging()` and `st_TexSubImage()` etc before going
to blit.
Signed-off-by: Luc Ma <luc@sietium.com>
Edited by Luc Ma