UefiPayloadPkg: Get platform specific logic via protocol for BDS

UefiPayloadPkg: Get platform specific logic via protocol for BDS

Currently, BDS driver will link a PlatformBootManagerLib, which contains
platform specific logic. This patch get the platform specific logic from
a protocol, so that platform logic for Boot manager can be in another
binary.

Cc: Maurice Ma <maurice.ma@intel.com>
Cc: Guo Dong <guo.dong@intel.com>
Cc: Benjamin You <benjamin.you@intel.com>
Reviewed-by: Guo Dong <guo.dong@intel.com>
Signed-off-by: Zhiguang Liu <zhiguang.liu@intel.com>