[Bug middle-end/107601] Change SLOW_BYTE_ACCESS into WIDEN_MODE_ACCESS_BITFIELD target hook

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107601

--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Even though this is bitfield related, this is some cleanup I am still aiming on
working on during GCC 15.