Remove a variable which is assigned to but never used. Add proper include (<nvgpu/log2.h>) for ilog2(). JIRA NVGPU-525 Change-Id: I42f3fddad9c294dc64343082e1dbd44b19120089 Signed-off-by: Alex Waterman <alexw@nvidia.com> Reviewed-on: https://git-master.nvidia.com/r/1673816 Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com> Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>