net/smc: compatible with 128-bits extended GID of virtual ISM device

[ Upstream commit b40584d1 ]

According to virtual ISM support feature defined by SMCv2.1, GIDs of
virtual ISM device are UUIDs defined by RFC4122, which are 128-bits
long. So some adaptation work is required. And note that the GIDs of
existing platform firmware ISM devices still remain 64-bits long.

Signed-off-by: Wen Gu <guwen@linux.alibaba.com>
Reviewed-by: Alexandra Winter <wintera@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Stable-dep-of: 0541db8e ("net/smc: initialize close_work early to avoid warning")
Signed-off-by: Sasha Levin <sashal@kernel.org>