According to the UEFI Specification version 2.11, the valid range for the
Year field in the EFI_TIME structure is from 1900 to 9999.
Currently IsTimeValid() checks a restricted range 2000 - 2099.
Update range in TimeBaseLib.c to match UEFI specification.
Signed-off-by: Pankaj Singh <pansing@qti.qualcomm.com>