msm: ipa: Move NAT invalid protocol define to uapi

NAT invalid protocol is needed by user space process.
Move it to uapi to make it accessible to user space.

Change-Id: I4d1700176483c93f78f48979d602f7568867b378
Acked-by: Michal Amsterdam <mamsterd@qti.qualcomm.com>
Signed-off-by: Amir Levy <alevy@codeaurora.org>