radv: Fix modifier property query.

radv: Fix modifier property query.

radv_get_modifier_flags read the format properties, doesn't write any. Setting
the central format properties based on the drm format properties doesn't make
any sense.

Fixes: 5dee0d9da96 "radv: switch to VK_FORMAT_FEATURE_2_XXX/VkFormatProperties3KHR"
Closes: https://gitlab.freedesktop.org/mesa/mesa/-/issues/5498
Reviewed-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Tested-By: Mike Blumenkrantz <michael.blumenkrantz@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/13357>