ubsan: Fix incorrect hand-side used in handle

__ubsan_handle_divrem_overflow() incorrectly uses the RHS to report.
It always reports the same log: division of -1 by -1. But it should
report division of LHS by -1.

Signed-off-by: Junhui Pei <paradoxskin233@gmail.com>
Fixes: c6d30853 ("UBSAN: run-time undefined behavior sanity checker")
Link: https://lore.kernel.org/r/20250602153841.62935-1-paradoxskin233@gmail.com


Signed-off-by: Kees Cook <kees@kernel.org>