ANDROID: KVM: arm64: Relax SMCCC version check during FF-A proxy init

Although FF-A claims to require version v1.2 of SMCCC, in reality the
current set of calls work just fine with v1.1 and some devices ship with
EL3 firmware that advertises this configuration.

Allow pKVM to proxy FF-A calls for these devices by relaxing our SMCCC
version check to permit SMCCC v1.1+

Reported-by: Alan Stokes <alanstokes@google.com>
Bug: 357781595
Bug: 222663556
Signed-off-by: Will Deacon <willdeacon@google.com>
Change-Id: I41e9ff35f169df3609acee7bbc67999c1d11c9d1