pldm: Migrate to pldm_bios_table_attr_value_entry_encode_integer_check()

pldm_bios_table_attr_value_entry_encode_integer() is deprecated in
libpldm as it uses assert() to sanitize its parameters. Use
pldm_bios_table_attr_value_entry_encode_integer_check() instead, which
returns a value indicating success or failure.

Signed-off-by: Andrew Jeffery <andrew@aj.id.au>
Change-Id: Ic308d24a83fe3371a7ef074cb1d20092a06a1291