Only some variants of FCVTZS and FCVTZU (vector, fixed-point) require FP16

This line seems to make all variants of FCVTZU (vector, fixed-point) require FP16:

https://github.com/DynamoRIO/dynamorio/blob/0192e25ec92c7540f4179727e23b3ebd72c0f4db/core/ir/aarch64/codec_v82.txt#L118

But in fact only the variants that match `0x1011110001xxxx111111xxxxxxxxxx` require FP16, as I understand it.

The same is presumably true for FCVTZS and may be true for some other instructions.