rte_cfgfile_section_num_entries_by_index was missing from the map file.
meson build failed when calling this function,
due to linking a binary to cfgfile built as a shared library.
Fixes: 3d2e0448ebb5 ("cfgfile: add section number of entries by index")
Cc: stable@dpdk.org
Signed-off-by: Liron Himi <lironh@marvell.com>
Acked-by: Cristian Dumitrescu <cristian.dumitrescu@intel.com>