staging: unisys: rename Process_Incoming()

Fix the CamelCase function name:

Process_Incoming => process_incoming

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>