x86/tsx: Deprecate vpmu=rtm-abort and use tsx=<bool> instead

x86/tsx: Deprecate vpmu=rtm-abort and use tsx=<bool> instead

This reuses the rtm_disable infrastructure, so CPUID derivation works properly
when TSX is disabled in favour of working PCR3.

vpmu= is not a supported feature, and having this functionality under tsx=
centralises all TSX handling.

Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
Acked-by: Jan Beulich <jbeulich@suse.com>
Reviewed-by: Roger Pau Monné <roger.pau@citrix.com>
(cherry picked from commit 9fdcf851689cb2a9501d3947cb5d767d9c7797e8)