FROMGIT: KVM: arm64: Mark optional FF-A 1.2 interfaces as unsupported

Mark FF-A 1.2 interfaces as unsupported lest they get proxied.

Acked-by: Will Deacon <will@kernel.org>
Signed-off-by: Per Larsen <perlarsen@google.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>

Bug: 280886201
(cherry picked from commit 8d24683e
 https://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm.git

 next)
Change-Id: I0ba9d38bd37ed1069ad72c62592b695b546a59b0
Signed-off-by: Per Larsen <perlarsen@google.com>