vtpmmgr: make inline functions static

vtpmmgr: make inline functions static

gcc7 is more strict with functions marked as inline. They are not
automatically inlined. Instead a function call is generated, but the
actual code is not visible by the linker.

Do a mechanical change and mark every 'inline' as 'static inline'. For
simpler review the static goes into an extra line.

Signed-off-by: Olaf Hering <olaf@aepfle.de>
Tested-by: Wei Liu <wei.liu2@citrix.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>