The PR112736 testcase fails on RISC-V because the aligned exception
uses the wrong check. The alignment support scheme can be
dr_aligned even when the access isn't aligned to the vector size
but some targets are happy with element alignment. The following
fixes that.
PR tree-optimization/113073
* tree-vect-stmts.cc (vectorizable_load): Properly ensure
to exempt only vector-size aligned overreads.