Unbreak 800x600x32bpp Elsa Winner 1000 928VL mode.

[TC1995]

Summary

Fix its clock and as well as 640x480x32bpp OEM mode clock.

Checklist

• Closes #xxx
• I have tested my changes locally and validated that the functionality works as intended
• I have discussed this with core contributors already
• This pull request requires changes to the ROM set
  • I have opened a roms pull request - https://github.com/86Box/roms/pull/changeme/

References

Provide links to datasheets or other documentation that helped you implement this pull request.