[llvm] [RISCV][NFC] Remove rdty arg of PseudoLoad and the default rdty value of PseudoFloatLoad (PR #67014)

[Alex Bradbury via llvm-commits]

https://github.com/asb commented:

What do you think about leaving PseudoLoad named as it is for now? Having PseudoIntLoad but PseudoStore is inconsistent, and I think PseudoLoad+PseudoStore is fine, as that corresponds to the naming of the load/store instructions in RISC-V (referred to as just load and store, rather than integer load and store).

https://github.com/llvm/llvm-project/pull/67014