hwmon: (nct6683) Support ASRock boards

Tested with ASRock X570 Phantom Gaming-ITX/TB3. It also appears
on other ASRock boards.
Signed-off-by: Blaž Hrastnik <blaz@mxxn.io>
Link: https://lore.kernel.org/r/b08d641c-3fb5-4845-85f7-e1753149cd7d@www.fastmail.comSigned-off-by: Guenter Roeck <linux@roeck-us.net>

Documentation/hwmon/nct6683.rst

@@ -61,5 +61,6 @@ Board		Firmware version
 Intel DH87RL	NCT6683D EC firmware version 1.0 build 04/03/13
 Intel DH87MC	NCT6683D EC firmware version 1.0 build 04/03/13
 Intel DB85FL	NCT6683D EC firmware version 1.0 build 04/03/13
+ASRock X570	NCT6683D EC firmware version 1.0 build 06/28/19
 MSI B550	NCT6687D EC firmware version 1.0 build 05/07/20
 =============== ===============================================

drivers/hwmon/nct6683.c

@@ -169,6 +169,7 @@ superio_exit(int ioreg)
 #define NCT6683_CUSTOMER_ID_INTEL	0x805
 #define NCT6683_CUSTOMER_ID_MITAC	0xa0e
 #define NCT6683_CUSTOMER_ID_MSI		0x201
+#define NCT6683_CUSTOMER_ID_ASROCK		0xe2c
 
 #define NCT6683_REG_BUILD_YEAR		0x604
 #define NCT6683_REG_BUILD_MONTH		0x605
@@ -1225,6 +1226,8 @@ static int nct6683_probe(struct platform_device *pdev)
 		break;
 	case NCT6683_CUSTOMER_ID_MSI:
 		break;
+	case NCT6683_CUSTOMER_ID_ASROCK:
+		break;
 	default:
 		if (!force)
 			return -ENODEV;