[SM6.10][Bugfix][HLK] Only define SDK consts when missing#8341

V-FEXrt merged 2 commits intomicrosoft:mainmicrosoft/DirectXShaderCompiler:mainfrom

V-FEXrt:linalg-cond-defineV-FEXrt/DirectXShaderCompiler:linalg-cond-defineCopy head branch name to clipboard