Add text descriptions for asm.cpu values in ARM architecture plugin

[kavin-t28]

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

This pull request adds text descriptions for each asm.cpu value in the ARM architecture plugin. This enhancement will help users, especially those who are not familiar with less common architectures, to understand the asm.cpu values better.

Test plan

1. Verify that the descriptions for asm.cpu values are correctly added in the arm_cpus array.
2. Ensure that the descriptions are displayed correctly when querying asm.cpu values.
3. Run the existing tests to ensure no functionality is broken.

Closing issues

closes #XXXX

[XVilka]

What is this? Have you even tried? It will not work.

[kavin-t28]

I tried to do it from my understanding , please guide me if i have done something wrong

[wargio]

I'm sorry, but explain us how this should work (by your logic)? it's like you thrown random text in a file