e1000e: Do not take care about recovery NVM checksum

On new platforms, the NVM is read-only. Attempting to update the NVM
is causing a lockup to occur. Do not attempt to write to the NVM
on platforms where it's not supported.
Emit an error message when the NVM checksum is invalid.

Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=213667
Fixes: fb776f5d ("e1000e: Add support for Tiger Lake")
Suggested-by: Dima Ruinskiy <dima.ruinskiy@intel.com>
Suggested-by: Vitaly Lifshits <vitaly.lifshits@intel.com>
Signed-off-by: Sasha Neftin <sasha.neftin@intel.com>
Tested-by: Dvora Fuxbrumer <dvorax.fuxbrumer@linux.intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>

drivers/net/ethernet/intel/e1000e/ich8lan.c

@@ -4127,6 +4127,9 @@ static s32 e1000_validate_nvm_checksum_ich8lan(struct e1000_hw *hw)
 		return ret_val;
 
 	if (!(data & valid_csum_mask)) {
+		e_dbg("NVM Checksum Invalid\n");
+
+		if (hw->mac.type < e1000_pch_cnp) {
 			data |= valid_csum_mask;
 			ret_val = e1000_write_nvm(hw, word, 1, &data);
 			if (ret_val)
@@ -4135,6 +4138,7 @@ static s32 e1000_validate_nvm_checksum_ich8lan(struct e1000_hw *hw)
 			if (ret_val)
 				return ret_val;
 		}
+	}
 
 	return e1000e_validate_nvm_checksum_generic(hw);
 }