[llvm] [MIPatternMatch] Fix incorrect argument type of m_Type (PR #121074)

[Min-Yih Hsu via llvm-commits]

mshockwave wrote:

> I don't really know what use m_Type is useful for.

I am not actively using it either (found this bug when I was adding another feature). The only uses I can think of are matching the types of pre-legalized extension/truncations

https://github.com/llvm/llvm-project/pull/121074