The NVMAP2 namespace existed so the refactored
functions could exist next to the originals.
Now that the major rewrite is finished
rename back to 'nvmap' prefix

TMM-153

Change-Id: Ibd52511b35b65b98a1593573ee77d540b0d7a725
Signed-off-by: David Gilhooley <dgilhooley@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1818121


GVS: Gerrit_Virtual_Submit
Reviewed-by: Krishna Reddy <vdumpa@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>