staging: ion: Fix a coding style issue

This patch fixes the alignment of an allocation flag block comment
and moves the comments before each #define.

Signed-off-by: Antti Keränen <detegr@gmail.com>
Acked-by: Laura Abbott <labbott@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>