Keyboards/sol rev2 fix

[XScorpion2]

Description

Fixed rgbkb/sol/rev2/config.h config.h. It was not building after changes from #13349 due to missing default led counts. Reordered the defines and added additional comments for readability.

Types of Changes

• Core
• Bugfix
• New feature
• Enhancement/optimization
• Keyboard (addition or update)
• Keymap/layout/userspace (addition or update)
• Documentation

Issues Fixed or Closed by This PR

Checklist

• My code follows the code style of this project: C, Python
• I have read the PR Checklist document and have made the appropriate changes.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• I have tested the changes and verified that they work and don't break anything (as well as I can manage).

[drashna]

Still errors out:

Compiling: keyboards/rgbkb/sol/rev2/rev2.c                                                         keyboards/rgbkb/sol/rev2/rev2.c:12:13: error: 'FULLHAND_LEDS' undeclared here (not in a function)
 #define LO (FULLHAND_LEDS / 2)
             ^~~~~~~~~~~~~
keyboards/rgbkb/sol/rev2/rev2.c:13:8: note: in expansion of macro 'LO'
     {  LO+62,  LO+63,  LO+64,  LO+65,  LO+66,  LO+67,  LO+68 },
        ^~