bsp: Initialize protobuf interface after capsule update provider
Initiliazing protobuf interface before capsule update provider changes the capsule update provider ID that is hardcoded by u-boot and breaks the capsule update mechanism in corstone1000. This moves the initialization of protobuf interface at end of se-proxy setup phase, and fixes capsule update mechanism without any change required in u-boot.
Signed-off-by: Emekcan Aras Emekcan.Aras@arm.com