qcacmn: Add a check to ensure validity of ini file

The function qdf_ini_parse returns QDF_STATUS as SUCCESS even if no
fields are read from the ini file. Because of this even if the
ini file is corrupted and no values are read from it the function
still returns SUCCESS.

So, to avoid that and ensure that the ini file is not corrupted,
add a variable ini_read_count to count the number of fields read
from the ini file and return SUCCESS only if its value is not zero.

Change-Id: I5ec9a9cdc9780b6c9487f6ac64b411b81328d75c
CRs-Fixed: 2804937