staging: unisys: fix CamelCase in struct device_info

Clean up CamelCase names:
channelAddr => channel_addr
channelBytes => channel_bytes
channelTypeGuid => channel_uuid
devInstGuid => instance_uuid
busNo => bus_no
devNo => dev_no

Signed-off-by: Benjamin Romer <benjamin.romer@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>