Remove aarch64_cannot_change_mode_class as the underlying issue
(PR67609) has been resolved. This avoids a few unnecessary lane
widening operations like:
faddp d18, v18.2d
mov d18, v18.d[0]
gcc/
PR67609
* config/aarch64/aarch64.h (CANNOT_CHANGE_MODE_CLASS): Remove.
* config/aarch64/aarch64.c
(aarch64_cannot_change_mode_class): Remove function.
* config/aarch64/aarch64-protos.h
(aarch64_cannot_change_mode_class): Remove.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@236817 138bc75d-0d04-0410-961f-82ee72b054a4