Enable the RAP TA loading path and add RAP test
trigger interface.

v2: fix potential mem leak issue
Signed-off-by: NWenhui Sheng <Wenhui.Sheng@amd.com>
Reviewed-by: NGuchun Chen <Guchun.Chen@amd.com>
Reviewed-by: NHawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>