libretro-nestopia: Update to 1.48
libretro changes:
Additions:
- Added ability to load custom palettes
- Added many palettes (Monroe88)
- Added monochrome blargg NTSC filter (dalter)
- Added Turbo A/B buttons
Core changes:
Additions:
- RAM Power-on State setting
- Support for mapper 23.10
Fixes:
- VRC2 Mirroring bug (koitsu, lidnariq)
- Dendy timing and audio fixes (FHorse, Eugene.S)
- Removed unused code in APU
- Properly initialize RAM - fixes F-1 Race (koitsu)
- Silenced many build warnings (orbea)
a9448d7cff