radv: it isn't an error to not support a format or driver

This reverts two of the vk_error changes:

reporting unsupported format is common,
and testing non-amdgpu drivers and ignoring them is also common.

Fixes: cd64a4f70 (radv: use vk_error() everywhere an error is returned)
Reviewed-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
2 files changed