improve fold_add_divmod_recombine [pr]

[chenyuxyz]

also check if whole term matches

[github-actions]

Changes

Name                              Lines    Diff    Tokens/Line    Diff
------------------------------  -------  ------  -------------  ------
tinygrad/uop/ops.py                1288      +4           18.3    -0.0
tinygrad/uop/spec.py                174      +6           26.0    -0.4
tinygrad/engine/allocations.py      122      +1           17.1    -0.0
tinygrad/schedule/multi.py          121      +7           20.8    -0.3


total lines changes: +18