MdeModulePkg: Fix device path when boot manager menu is from different FV

MdeModulePkg: Fix device path when boot manager menu is from different FV

REF: https://bugzilla.tianocore.org/show_bug.cgi?id=3441

When the boot manager menu is from different FV, the current logic still
use the device path of the FV as the module links to this library

Cc: Jian J Wang <jian.j.wang@intel.com>
Cc: Hao A Wu <hao.a.wu@intel.com>
Cc: Zhichao Gao <zhichao.gao@intel.com>
Cc: Ray Ni <ray.ni@intel.com>
Reviewed-by: Ray Ni <ray.ni@intel.com>
Acked-by: Hao A Wu <hao.a.wu@intel.com>
Signed-off-by: Zhiguang Liu <zhiguang.liu@intel.com>