qcacld-3.0: Rename pftSessionEntry

The identifier pftSessionEntry, which is used throughout the LIM FT
code, does not conform to the Linux coding style, so rename it to
ft_session to be compliant.

Change-Id: I466b396e4f84f1e02fa50dffa857fd43000fba27
CRs-Fixed: 2359658
3 files changed