qcacld-3.0: Replace typedef tSirKeepAliveReq

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 tSirKeepAliveReq typedef does
not meet any of those criteria, so replace it (and the "tp" variant)
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: I68e1607c76c1ed1b7bc570ecae677e9c790803cb
CRs-Fixed: 2396065
8 files changed