freedreno: Used cached coherent for staging resources

These are really only accessed by the GPU once, so CPU access speed is
more important.  Especially for PIPE_MAP_READ.

Signed-off-by: Rob Clark <robdclark@chromium.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/11176>

src/gallium/drivers/freedreno/freedreno_resource.c

@@ -196,6 +196,7 @@ realloc_bo(struct fd_context *ctx, struct fd_resource *rsc, uint32_t size)
    struct pipe_resource *prsc = &rsc->b.b;
    struct fd_screen *screen = fd_screen(rsc->b.b.screen);
    uint32_t flags =
+      COND(prsc->usage & PIPE_USAGE_STAGING, FD_BO_CACHED_COHERENT) |
       COND(prsc->bind & PIPE_BIND_SCANOUT, FD_BO_SCANOUT);
    /* TODO other flags? */