qcacld-3.0: Replace typedef tSirTxPowerLimit

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 tSirTxPowerLimit typedef does
not meet any of those criteria, so replace it with a reference to the
underlying struct.

Further note the Linux Coding Style frowns upon mixed-case names and
so-called Hungarian notation, so in conjunction rename the underlying
struct to be in compliance.

Change-Id: I0c466bfbf4b820911e983f8bf74dc9e6f7e8ab70
CRs-Fixed: 2399110
7 files changed