Fix the bug that use same FMP_PAYLOAD in different capsule file. Because in previous FMP generation, the FMP already be generated, so we don't need to regenerate again. Cc: Liming Gao <liming.gao@intel.com> Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Yonghong Zhu <yonghong.zhu@intel.com> Reviewed-by: Liming Gao <liming.gao@intel.com>