radeonsi: enable dcc image stores on gfx10+

radeonsi: enable dcc image stores on gfx10+

This was implemented in 1d3bffaf9cb7ade0676bab969b5d33d6bdabcec8,
but missing the WRITE_COMPRESS_ENABLE bit, then disabled by
4dc6ed2a59040f04648eadbffeb1522587d00f3.

This commits reimplements it to:
- avoid disabling dcc when uploading FP16 textures
  (see si_use_compute_copy_for_float_formats)
- being able to use compute to upload textures in more cases, rather
  than using the blit path

Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/8958>