drm/amd/display: Explicit casting for grph object ids

C++ compilers don't like the implicit conversion
Signed-off-by: Harry Wentland <harry.wentland@amd.com>
Reviewed-by: Andrey Grodzovsky <Andrey.Grodzovsky@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/include/grph_object_id.h

@@ -248,7 +248,7 @@ static inline enum controller_id dal_graphics_object_id_get_controller_id(
 	struct graphics_object_id id)
 {
 	if (id.type == OBJECT_TYPE_CONTROLLER)
-		return id.id;
+		return (enum controller_id) id.id;
 	return CONTROLLER_ID_UNDEFINED;
 }
 
@@ -256,7 +256,7 @@ static inline enum clock_source_id dal_graphics_object_id_get_clock_source_id(
 	struct graphics_object_id id)
 {
 	if (id.type == OBJECT_TYPE_CLOCK_SOURCE)
-		return id.id;
+		return (enum clock_source_id) id.id;
 	return CLOCK_SOURCE_ID_UNDEFINED;
 }
 
@@ -264,7 +264,7 @@ static inline enum encoder_id dal_graphics_object_id_get_encoder_id(
 	struct graphics_object_id id)
 {
 	if (id.type == OBJECT_TYPE_ENCODER)
-		return id.id;
+		return (enum encoder_id) id.id;
 	return ENCODER_ID_UNKNOWN;
 }
 
@@ -272,7 +272,7 @@ static inline enum connector_id dal_graphics_object_id_get_connector_id(
 	struct graphics_object_id id)
 {
 	if (id.type == OBJECT_TYPE_CONNECTOR)
-		return id.id;
+		return (enum connector_id) id.id;
 	return CONNECTOR_ID_UNKNOWN;
 }
 
@@ -280,7 +280,7 @@ static inline enum audio_id dal_graphics_object_id_get_audio_id(
 	struct graphics_object_id id)
 {
 	if (id.type == OBJECT_TYPE_AUDIO)
-		return id.id;
+		return (enum audio_id) id.id;
 	return AUDIO_ID_UNKNOWN;
 }
 
@@ -288,7 +288,7 @@ static inline enum engine_id dal_graphics_object_id_get_engine_id(
 	struct graphics_object_id id)
 {
 	if (id.type == OBJECT_TYPE_ENGINE)
-		return id.id;
+		return (enum engine_id) id.id;
 	return ENGINE_ID_UNKNOWN;
 }
 #endif