Generate .amdhsa_reserve_xnack_mask 0 in all assembly kernels.

[atamazov]

This will prevent rolling back changes from ROCm/MIOpen#505 when regenerating kernels.

/cc @daniellowell @shurale-nkn

[atamazov]

Hmm... Perhaps this is not really required, see https://github.com/ROCmSoftwarePlatform/MIOpen/pull/505/files#r502967373

[carlushuang]

Hi @atamazov it seems @shurale-nkn added that .amdhsa_reserve_xnack_mask in every asm kernel source code in MIOpen, however it still seems the xnack default value is target-dependent.
Maybe I can add this directive while generate the kernels, but will generate different value of .amdhsa_reserve_xnack_mask based on target features. what do you think?

Ah, -mno-xnack compiler flag is still needed

[atamazov]

Most likely, this .amdhsa_reserve_xnack_mask 0 is not required in the generated kernels. The recent target-id related changes in the assembler looks weird. Let's see.

[carlushuang]

OK