staging: unisys: refactor visor_memregion_create()

Fix the sizeof() so it uses the variable name rather than the type, fix the
argument alignment to the kzalloc(), and rename the goto label.

Away => cleanup

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