qcacld-3.0: Replace typedef bss_description

Host driver code has several instances of struct bss_description
that is type defined to tSirBssDescription, *tpSirBssDescription
This goes against the linux coding style. This change replaces
tpSirBssDescription with struct bss_description *.

Also Linux Coding Style doesn't welcome mixed-case names. So
cleanup some mixed-case variable names as well.

This change should be followed by changes to replace
typedef tSirBssDescription also ultimately.

Change-Id: Ic6fa2d5c7db0d0c1fe4be1096d416295dcb83779
CRs-Fixed: 2409129
26 files changed