radeonsi/gfx9: fix importing shared textures with DCC

VI has 11 dwords at least. GFX9 has 10 dwords.

Cc: 17.2 17.3 <mesa-stable@lists.freedesktop.org>
Reviewed-by: Nicolai Hähnle <nicolai.haehnle@amd.com>
(cherry picked from commit ed478038)
[Emil Velikov: s|radeon/r600_texture.c|radeonsi/si_state.c|]
Signed-off-by: Emil Velikov <emil.velikov@collabora.com>

Conflicts:
	src/gallium/drivers/radeon/r600_texture.c