staging: unisys: fix CamelCase globals in uisutils.c

Rename CamelCase global variable names:

ReqHandlerInfo_list => req_handler_info_list
ReqHandlerInfo_list_lock => req_handler_info_list_lock

Update all references to use the new name.

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