[STEP 1] merge all api(MLLM, Adam) into AutoRound (#791)

* merge all api(MLLM, Adam) into AutoRound

Signed-off-by: n1ck-guo <heng.guo@intel.com>

Author: n1ck-guo

auto_round/__init__.py

@@ -11,8 +11,10 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-from auto_round.autoround import AutoRound, AutoRoundAdam
-from auto_round.mllm import AutoRoundMLLM
+from auto_round.autoround import AutoRound
+
+# support for old api
+from auto_round.autoround import AutoRoundLLM, AutoRoundMLLM, AutoRoundAdam
 from auto_round.utils import LazyImport