qcacld-3.0: Change WNI_CFG_COUNTRY_CODE_LEN to CFG_COUNTRY_CODE_LEN

All WNI configurations will be cleanup based on new cfg framework, so
change Change WNI_CFG_COUNTRY_CODE_LEN to CFG_COUNTRY_CODE_LEN.

Change-Id: I786b62e2c0aff08a89fc3c8a3359e2ffb4044269
CRs-Fixed: 2380488
11 files changed