r600g: allow copying between compatible un/compressed formats
r600g: allow copying between compatible un/compressed formats

See: `commit e82c527f1fc2f8ddc64954ecd06b0de3cea92e93`

which is where a block in src maps to a pixel in dst and vice versa.
    e.g. DXT1 <-> R32G32_UINT
         DXT5 <-> R32G32B32A32_UINT

Reviewed-by: Marek Olšák <8c7344a1abdb103e79ecfd488098373070c3c70e@amd.com>
Signed-off-by: Edward O'Callaghan <117173807d5a49976a891944633465c0daea7f98@alterapraxis.com>
Signed-off-by: Dave Airlie <f2295d84e358395675bc8031be58672073ae065e@redhat.com>

metora/MesaGLSLCompiler,metora/MesaGLSLCompiler,metora/MesaGLSLCompiler