prov/psm: restore the EQ func ptr for readfrom and condreadfrom

These functions are no longer optional. Also set the src_addr to
FI_ADDR_UNSPEC when the information is not available.

Signed-off-by: Jianxin Xiong <jianxin.xiong@intel.com>
Merge pull request #79 from j-xiong/master

prov/psm: restore the EQ func ptr for readfrom and condreadfrom