staging: unisys: refactor struct struct ultra_vbus_channel_protocol

Rename the struct to spar_vbus_channel_protocol. Fix CamelCase member names:

ChannelHeader => channel_header
HdrInfo => hdr_info
ChpInfo => chp_info
BusInfo => bus_info
DevInfo => dev_info

Update all references to use the changed names.

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