hyper-v: make uuid_le const

The uuid structure could be managed as a const in several places.

Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --cc drivers/hv/channel_mgmt.c
Simple merge

diff --cc drivers/hv/hyperv_vmbus.h
Simple merge

diff --cc drivers/hv/vmbus_drv.c
Simple merge