radv: don't vectorize shift operations
Currently, these cannot be vectorized as in NIR shift operands are 32bit while for 16bit-vectorization they need to be 16bit.
Fixes: fcd2ef23 ('radv: vectorize 16bit instructions')
Currently, these cannot be vectorized as in NIR shift operands are 32bit while for 16bit-vectorization they need to be 16bit.
Fixes: fcd2ef23 ('radv: vectorize 16bit instructions')