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/inc/hf/manifest.h b/inc/hf/manifest.h
index 8a01883..f9a899b 100644
--- a/inc/hf/manifest.h
+++ b/inc/hf/manifest.h
@@ -45,14 +45,6 @@
 
 enum xlat_granule { PAGE_4KB = 0, PAGE_16KB, PAGE_64KB };
 
-enum messaging_method {
-	DIRECT_MESSAGING = 0,
-	INDIRECT_MESSAGING,
-	BOTH_MESSAGING,
-	DIRECT_MESSAGING_MANAGED_EXIT,
-	BOTH_MESSAGING_MANAGED_EXIT
-};
-
 /**
  * Partition Memory region as described in PSA FFA v1.0 spec, Table 10
  */
@@ -145,7 +137,7 @@
 	struct rx_tx rxtx;
 
 	/** mandatory - direct/indirect msg or both */
-	enum messaging_method messaging_method;
+	uint8_t messaging_method;
 	/** optional */
 	bool has_primary_scheduler;
 	/** optional - preemptible / run to completion */