[llvm] [RISCV] Make Zhinx and Zvfh imply Zhinxmin and Zvfhmin respectively (PR #75735)

[Jianjian Guan via llvm-commits]

jacquesguan wrote:

In the V spec, "The Zvfh extension depends on the Zve32f and Zfhmin extensions.". It seems that there is no dependency between Zvfh and Zvfhmin. 

https://github.com/llvm/llvm-project/pull/75735