staging: unisys: refactor SignalRemoveAll()

Rename SignalRemoveAll to spar_signal_remove_all(), and fix CamelCase
names:

pChannel => ch
Queue => queue
pSignal => sig
signalCount => count

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