BACKPORT: FROMGIT: KVM: arm64: Bump the supported version of FF-A to 1.2

FF-A version 1.2 introduces the DIRECT_REQ2 ABI. Bump the FF-A version
preferred by the hypervisor to enable implementation of the 1.2-only
FFA_MSG_SEND_DIRECT_REQ2 and FFA_MSG_SEND_RESP2 messaging interfaces.

Co-developed-by: Ayrton Munoz <ayrton@google.com>
Signed-off-by: Ayrton Munoz <ayrton@google.com>
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 162190f2
 https://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm.git

 next)
Change-Id: I33ca4c47234698d7185d3e8547070ca132962adc
Signed-off-by: Per Larsen <perlarsen@google.com>