Fix the Op info test for nn.functional.smooth_l1_loss .. nn.functional.softsign

1. Find the lines 438 to 442 of test_ops.py and remove
   nn.functional.smooth_l1_loss .. nn.functional.softsign from skip_list
2. Run op_info test with pytest test/test_ops.py
3. Fix the failure.

Please refer to
this guide as guide to fix:

Also refer to these PRs:

• Add bitwise_left_shift, bitwise_right_shift #7343
• Add support for baddbmm, bincount #7312
• Add support for trig, binary, algebraic ops #7325