ath11k: Enable remain-on-channel support on WCN6750

Enable remain on channel support on WCN6750 as it is needed for
GAS, Passpoint.

Tested-on: WCN6750 hw1.0 AHB WLAN.MSL.1.0.1-00887-QCAMSLSWPLZ-1
Signed-off-by: Manikanta Pubbisetty <quic_mpubbise@quicinc.com>
Signed-off-by: Kalle Valo <quic_kvalo@quicinc.com>
Link: https://lore.kernel.org/r/20220901080656.3450-1-quic_mpubbise@quicinc.com

drivers/net/wireless/ath/ath11k/core.c

@@ -537,7 +537,7 @@ static const struct ath11k_hw_params ath11k_hw_params[] = {
 		.static_window_map = true,
 		.hybrid_bus_type = true,
 		.fixed_fw_mem = true,
-		.support_off_channel_tx = false,
+		.support_off_channel_tx = true,
 		.supports_multi_bssid = true,
 	},
 };