host-bmc: Migrate to pldm_entity_association_pdr_add_from_node_check()

pldm_entity_association_pdr_add_from_node() is deprecated in libpldm as
it relied on assert() to communicate failures from the implementation.
pldm_entity_association_pdr_add_from_node_check() instead returns a
value indicating success or failure.

Signed-off-by: Andrew Jeffery <andrew@aj.id.au>
Change-Id: If5ef1f372f0e835e8d97affcaab7a9abc2625d97