Revert "pan/bi: Fix load_const of 1-bit booleans"
This reverts commit 29d319c7 . Now that we use nir_lower_bool_to_bitsize, we don't see 1-bit booleans anymore, so the issue this fixed doesn't apply. Actually, that issue was (in part) why I started looking into boolean handling in the first place. Signed-off-by: Alyssa Rosenzweig <email@example.com>