staging: unisys: fix CamelCase name

Fix CamelCase global variable:

UltraDiagPoolChannelProtocolGuid => spar_diag_pool_channel_protocol_uuid

Update all references to use the fixed name.

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