Avoid testing to_chx and from_chx against intel64 device
Avoid testing to_chx and from_chx against intel64 device

niboshi/chainer,hvy/chainer,chainer/chainer,wkentaro/chainer,chainer/chainer,chainer/chainer,niboshi/chainer,hvy/chainer,hvy/chainer,niboshi/chainer,hvy/chainer,wkentaro/chainer,wkentaro/chainer,pfnet/chainer,chainer/chainer,wkentaro/chainer,niboshi/chainer