Function validate_fixed_buffer used to do a linear search for
collision detection of already mapped buffers. Optimize this by doing
a nice logarithmic search instead.
Change-Id: Ifbf2ec015741d44883da27bc6f8cc090c48da145
Signed-off-by: Sami Kiminki <skiminki@nvidia.com>
Reviewed-on: http://git-master/r/739682
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>
Tested-by: Terje Bergstrom <tbergstrom@nvidia.com>