oem-ibm: Adding system specific bios attribute files

Below are the, System specific bios attribute infrastructure commits
Commit - https://gerrit.openbmc.org/c/openbmc/pldm/+/55997
       - https://gerrit.openbmc.org/c/openbmc/pldm/+/68451



Adding BIOS Attribute files for system types mentioned below
    1. Rainier-1s4u
    2. Rainier-2u
    3. Rainier-4u
    4. Everest
    5. Bonnell

Change-Id: I209dcff347cf83322857a2ac23353269f23217f3
Signed-off-by: Archana Kakani <archana.kakani@ibm.com>