staging: unisys: Remove unused driver

The visorchannel feature is rolled into visorbus now and its headers
are public under visorbus.h.  Remove the unused driver, the old
header file and all the ccflag includes in the Makefile.

Also remove VISORCHANNEL from all Kconfigs as it is not needed.
Signed-off-by: Don Zickus <dzickus@redhat.com>
Signed-off-by: Benjamin Romer <benjamin.romer@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/unisys/visorchipset/Kconfig

@@ -5,7 +5,6 @@
 config UNISYS_VISORCHIPSET
 	tristate "Unisys visorchipset driver"
 	select UNISYS_VISORUTIL
-	select UNISYS_VISORCHANNEL
 	select UNISYS_VISORBUS
 	---help---
 	If you say Y here, you will enable the Unisys visorchipset driver.