These are u64 variables that come from the user via
qaic_attach_slice_bo_ioctl(). Use check_add_overflow() to ensure that
the math doesn't have an integer wrapping bug.
Cc: stable@xxxxxxxxxxxxxxx
Fixes: ff13be830333 ("accel/qaic: Add datapath")
Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>