staging: unisys: visorbus: renamed #defines in controlvmchannel.h to match driver namespace

Renamed #defines
* SPAR_CONTROLVM_CHANNEL_PROTOCOL_UUID to
		VISOR_CONTROLVM_CHANNEL_UUID
* ULTRA_CONTROLVM_CHANNEL_PROTOCOL_SIGNATURE to
		VISOR_CONTROLVM_CHANNEL_SIGNATURE
* ULTRA_CONTROLVM_CHANNEL_PROTOCOL_VERSIONID to
		VISOR_CONTROLVM_CHANNEL_VERSIONID
* SPAR_CONTROLVM_CHANNEL_OK_CLIENT to
		VISOR_CONTROLVM_CHANNEL_OK_CLIENT

Signed-off-by: Sameer Wadgaonkar <sameer.wadgaonkar@unisys.com>
Signed-off-by: David Kershner <david.kershner@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>