panfrost: always print the bad ALU op if we're failing to translate.

CI failure could have told me what needed fixing, but no...

Acked-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/16437>

src/panfrost/midgard/midgard_compile.c

@@ -946,7 +946,7 @@ emit_alu(compiler_context *ctx, nir_alu_instr *instr)
         }
 
         default:
-                DBG("Unhandled ALU op %s\n", nir_op_infos[instr->op].name);
+                mesa_loge("Unhandled ALU op %s\n", nir_op_infos[instr->op].name);
                 assert(0);
                 return;
         }