staging: unisys: Fix CamelCase in uislib_client_inject_add_bus()

Fix CamelCase names:
busNo => bus_no
instGuid => inst_uuid
channelAddr => channel_addr
nChannelBytes => n_channel_bytes

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