[IntegerDivision][AMDGPU] Use CreateLogicalOr to block poison propagation.

There are two ctlz intrinsics here with the zero_is_poison flag
set. There are also two comparisons that check if either of the
inputs the ctlzs are zero. We need to use a logical or to block
the poison from the ctlz if either of the inputs is zero.

Reviewed By: arsenm, aqjune

Differential Revision: https://reviews.llvm.org/D130680