staging: unisys: visorbus: Remove unused values from guestlinuxdebug

Remove guestlinuxdebug enum values that are no longer being used and
renumber remaining values accordingly.

Signed-off-by: Bryan Thompson <bryan.thompson@unisys.com>
Signed-off-by: David Kershner <david.kershner@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>