Solar sensor settings not detected by game

[SolarKidintheShade]

Git copy of:
https://forums.mgba.io/showthread.php?tid=4657
Summary:
Solar sensor settings not being detected by UE dumps of Boktai or Boktai 2
Behaving as though no solar sensor is detected/cartridge is damaged
Details and screenshots in thread

[endrift]

Regressed in 0ce3b9a.