afs: Automatically generate trace tag enums

[ Upstream commit 2daa6404 ]

Automatically generate trace tag enums from the symbol -> string mapping
tables rather than having the enums as well, thereby reducing duplicated
data.

Signed-off-by: David Howells <dhowells@redhat.com>
cc: Marc Dionne <marc.dionne@auristor.com>
cc: Jeff Layton <jlayton@kernel.org>
cc: linux-afs@lists.infradead.org
cc: linux-fsdevel@vger.kernel.org
Stable-dep-of: 247d65fb ("afs: Fix missing subdir edit when renamed between parent dirs")
Signed-off-by: Sasha Levin <sashal@kernel.org>