Optimized linear op doesn't support bias

[swolchok]

🐛 Describe the bug

I left it out for implementation expediency. See

executorch/kernels/optimized/cpu/op_linear.cpp

Line 32 in 440a3ac

"bias not supported yet in linear");

.

I believe all that needs to be done is to get the bias into the C matrix passed to GEMM and then set beta to 1.0 per https://en.wikipedia.org/wiki/Basic_Linear_Algebra_Subprograms#Level_3 .

Versions

N/A

cc @larryliu0820 @manuelcandales

[DavitGrigoryan132]

Hi @swolchok, I would be happy to work on this issue

[swolchok]

Hi @swolchok, I would be happy to work on this issue

How's it going?

[DavitGrigoryan132]

Hi @swolchok the functionality is implemented and tested, will add tests and create PR soon