aco: fix unreachable() for uniform 8/16-bit nir_op_mov from VGPR

Signed-off-by: Rhys Perry <pendingchaos02@gmail.com>
Reviewed-by: Daniel Schürmann <daniel@schuermann.dev>
Fixes: d20a752c0de ("aco: use Builder::copy more")
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/8380>
(cherry picked from commit 816b7fb5cb622dd6c5d0fbcecdcb27779029f80f)
2 files changed