fix(ff-a): use messaging info from the manifest

Adds a messaging method to the VM structure. Refactor messaging info
field in the manifest to comply with information in specification. In
particular - distinguish between the direct message send/receive.
Use messaging method from the manifest to populate partition info for
FFA_PARTITION_INFO_GET ABI. Populates partition info based on the
caller id (SP can send direct messages to other SPs).
Refactors managed exit check to use messaging method value.

Signed-off-by: Maksims Svecovs <maksims.svecovs@arm.com>
Change-Id: Id0734c18d14879b89ba3517b8ff4b3b41b53b56f
diff --git a/src/arch/aarch64/hypervisor/handler.c b/src/arch/aarch64/hypervisor/handler.c
index 414167f..dcfb507 100644
--- a/src/arch/aarch64/hypervisor/handler.c
+++ b/src/arch/aarch64/hypervisor/handler.c
@@ -920,7 +920,7 @@
 	struct vcpu *current_vcpu = current();
 	int ret;
 
-	if (current_vcpu->vm->supports_managed_exit) {
+	if (vm_managed_exit_supported(current_vcpu->vm)) {
 		/* Mask all interrupts */
 		plat_interrupts_set_priority_mask(0x0);