Fix PowerPC LI & LIS instructions

[wargio]

Your checklist for this pull request

• I've read the guidelines for contributing to this repository
• I made sure to follow the project's coding style
• I've documented or updated the documentation of every function and struct this PR changes. If not so I've explained why.
• I've added tests that prove my fix is effective or that my feature works (if possible)
• I've updated the rizin book with the relevant information (if needed)

Detailed description

Capstone next does support PPC_INS_LI and PPC_INS_LIS

[wargio]

failures are unrelated to this PR (see dev branch)

[Rot127]

Damn, those are bugs. They should be alias.
Do you still have the bytes which triggered them?

[wargio]

Damn, those are bugs. They should be alias. Do you still have the bytes which triggered them?

Those are not actual bugs, before the last update (when i was working on a newer version of capstone compared to dev) the RzIL ppc test was failing to detect the LI/LIS instructions because of that.

Now the alias exists and can be kept outside the #if #endif