UefiPayloadPkg/UefiPayloadPkgIa*.dsc: Change some PCDs type

UefiPayloadPkg/UefiPayloadPkgIa*.dsc: Change some PCDs type

REF: https://bugzilla.tianocore.org/show_bug.cgi?id=2786

Since the type of PcdStatusCodeUseSerial and PcdStatusCodeUseMemory
in MdeModulePkg.dec are changed, so change them from
PcdsFeatureFlag to PcdsFixedAtBuild in dsc files.

Cc: Maurice Ma <maurice.ma@intel.com>
Reviewed-by: Guo Dong <guo.dong@intel.com>
Cc: Benjamin You <benjamin.you@intel.com>
Signed-off-by: Ming Tan <ming.tan@intel.com>