etnaviv: Do not filter out depth or stencil formats on pre-HALTI2
The depth and stencil formats, like PIPE_FORMAT_S8_UINT_Z24_UNORM , are supported even on pre-HALTI hardware like GCnano. Do not report these as unsupported formats. This fixes the following dEQP on GCnano: dEQP-GLES2.functional.fbo.completeness.renderable.texture.color0.depth_stencil_unsigned_int_24_8
Signed-off-by: Marek Vasut marex@denx.de