Define FixedPCD's to replace macros in RTC driver, to allow
for platform-specific configurations.
Cc: Ruiyu Ni <ruiyu.ni@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Leo Duran <leo.duran@amd.com> Reviewed-by: Ruiyu Ni <ruiyu.ni@intel.com>