Staging: Android: change memory allocation style in ion_carveout_heap.c

This is a patch to ion_carveout_heap.c to change the memory allocation
style in order to remove a checkpatch.pl warning.

Signed-off-by: Ben Marsh <bmarsh94@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>