pldm: srcrev bump d99cca374b..d21b57d78f

Patel-Kamalkumar (1):
      Adding bios attributes for RPD feature

Pavithra Barithaya (1):
      PLDM:Adding max settable value for boot counter effecter

Sagar Srinivas (1):
      PLDM: Add the full namespaces reference

Change-Id: I5ffc058553b88665e933184137873e52f22c2eae
Signed-off-by: Andrew Geissler <openbmcbump-github@yahoo.com>