feat(ff-a): add managed exit field in the manifest

Moving setting to enable/disable managed exit support from messaging
method field to a separate field in partition manifest. As of DEN0077A
FF-A v1.1 Beta0 section 5.2, managed exit support is moved out of
messaging-method field and is described in a separate field.

Signed-off-by: Maksims Svecovs <maksims.svecovs@arm.com>
Change-Id: I87506d7213b88d5a18073bea7357c381605d8b33
diff --git a/inc/hf/manifest.h b/inc/hf/manifest.h
index f9a899b..bdf0cb3 100644
--- a/inc/hf/manifest.h
+++ b/inc/hf/manifest.h
@@ -139,6 +139,8 @@
 	/** mandatory - direct/indirect msg or both */
 	uint8_t messaging_method;
 	/** optional */
+	bool managed_exit;
+	/** optional */
 	bool has_primary_scheduler;
 	/** optional - preemptible / run to completion */
 	uint8_t runtime_model;