staging: unisys: fix CamelCase Work queue name in uislib.c

Fix CamelCase name:

Work_wakeup_polling_device_channels => work_wakeup_polling_device_channels

Update 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>