qcacld-3.0: Replace typedef tSirWifiRate

The Linux Coding Style enumerates a few special cases where typedefs
are useful, but stresses "NEVER EVER use a typedef unless you can
clearly match one of those rules." The tSirWifiRate typedef does not
meet any of those criteria, so replace it (and the "tp" variant) with
a properly named struct.

In addition the Linux Coding Style frowns upon mixed-case names so
rename the rateMcsIdx member to make it compliant.

Change-Id: I719c9c563f5b382b0734be086bee4e5e89fe85aa
CRs-Fixed: 2427172
3 files changed