[llvm] [AMDGPU] gfx1152 does not have Feature1_5xVGPRs (PR #113163)

[Carl Ritson via llvm-commits]

perlfu wrote:

@jayfoad I don't understand, the section says "Not all VGPRs can be used on:", i.e. 1.5x VGPRs are not available?

https://github.com/llvm/llvm-project/pull/113163