Add BFloat16 support for smooth_l1_loss on CPU (#62558)
Summary:
Add BFloat16 support for smooth_l1_loss on CPU.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/62558
Reviewed By: H-Huang
Differential Revision: D34897859
Pulled By: frank-wei
fbshipit-source-id: a52138c89852642db78f5f3083d05873f3cdec3a
(cherry picked from commit 71908ee3de7ca0580a073350353ce6f234a8c6ff)
