staging: unisys: clean up enums in uisqueue.h

Get rid of typedefs in enums SWITCH_TYPE and IOPART_MSG_TYPE, and use the enum
names directly instead.

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