staging: unisys: clean up ULTRA_CHANNEL_SERVER_READY macro

Simplify this macro so it is only one macro, rename it to
SPAR_CHANNEL_SERVER_READY, and get rid of the CamelCase parameter name.

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