KVM: arm64: Remove FFA_MSG_SEND_DIRECT_REQ from the denylist

The denylist is blocking the 32 bit version of the call but is allowing
the 64 bit version of it. There is no reason for blocking only one of
them and the hypervisor should support these calls.

Signed-off-by: Sebastian Ene <sebastianene@google.com>
Link: https://lore.kernel.org/r/20240411135700.2140550-1-sebastianene@google.com
Signed-off-by: Marc Zyngier <maz@kernel.org>

arch/arm64/kvm/hyp/nvhe/ffa.c

@@ -600,7 +600,6 @@ static bool ffa_call_supported(u64 func_id)
 	case FFA_MSG_POLL:
 	case FFA_MSG_WAIT:
 	/* 32-bit variants of 64-bit calls */
-	case FFA_MSG_SEND_DIRECT_REQ:
 	case FFA_MSG_SEND_DIRECT_RESP:
 	case FFA_RXTX_MAP:
 	case FFA_MEM_DONATE: