wifi: ath12k: check hardware major version for WCN7850

This is to check the hardware major version for WCN7850 so only
supported hardware is initialized. Now only WCN7850 with major
version 2 is supported.

Tested-on: WCN7850 hw2.0 PCI WLAN.HMT.1.0-03427-QCAHMTSWPL_V1.0_V2.0_SILICONZ-1.15378.4
Signed-off-by: Carl Huang <quic_cjhuang@quicinc.com>
Signed-off-by: Kalle Valo <quic_kvalo@quicinc.com>
Link: https://lore.kernel.org/r/20230518105741.1281424-1-quic_cjhuang@quicinc.com

drivers/net/wireless/ath/ath12k/pci.c

@@ -1227,8 +1227,20 @@ static int ath12k_pci_probe(struct pci_dev *pdev,
 	case WCN7850_DEVICE_ID:
 		ab_pci->msi_config = &ath12k_msi_config[0];
 		ab->static_window_map = false;
-		ab->hw_rev = ATH12K_HW_WCN7850_HW20;
 		ab_pci->pci_ops = &ath12k_pci_ops_wcn7850;
+		ath12k_pci_read_hw_version(ab, &soc_hw_version_major,
+					   &soc_hw_version_minor);
+		switch (soc_hw_version_major) {
+		case ATH12K_PCI_SOC_HW_VERSION_2:
+			ab->hw_rev = ATH12K_HW_WCN7850_HW20;
+			break;
+		default:
+			dev_err(&pdev->dev,
+				"Unknown hardware version found for WCN7850: 0x%x\n",
+				soc_hw_version_major);
+			ret = -EOPNOTSUPP;
+			goto err_pci_free_region;
+		}
 		break;
 
 	default: