fabric: Rename FI_REMOTE_EQ_DATA

The EQ was renamed to CQ for completions.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
fabric: Update fi_tostr routine

Rename PP (pretty print) to 'tostr', since the function does
not actually print anything.  Change the fi_pp_type to just
fi_type for increased generality.

Move some header formatting functionality out into the
calling functions, so that headers do not appear in strings
for base data types.

Add a prefix parameter to the functions.  The prefix will be
inserted at the start of any new line.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>