qcacld-3.0: Add ini params for three antenna BTC mode

Add below ini parameters for three antenna BTC mode and send
them to firmware using WMI command WMI_COEX_CONFIG_CMDID.

1. gSetBTCMode
2. gSetAntennaIsolation
3. gSetMaxTxPowerForBTC
4. gSetWlanLowRssiThreshold
5. gSetBtLowRssiThreshold
6. gSetBtInterferenceLowLL
7. gSetBtInterferenceLowUL
8. gSetBtInterferenceMediumLL
9. gSetBtInterferenceMediumUL
10. gSetBtInterferenceHighLL
11. gSetBtInterferenceHighUL

Change-Id: I69030b6e80ee99912e2f3baced883894d18db0b6
CRs-Fixed: 2298652