hwmon: (nct7802) Fix integer overflow seen when writing voltage limits

Writing a large value into a voltage limit attribute can result
in an overflow due to an auto-conversion from unsigned long to
unsigned int.

Cc: Constantine Shulyupin <[e-mail]>
Reviewed-by: Jean Delvare <[e-mail]>
Cc: [e-mail] # v4.1+
Signed-off-by: Guenter Roeck <[e-mail]>

drivers/hwmon/nct7802.c

···
 }
 
 static int nct7802_write_voltage(struct nct7802_data *data, int nr, int index,
-				 unsigned int voltage)
+				 unsigned long voltage)
 {
 	int shift = 8 - REG_VOLTAGE_LIMIT_MSB_SHIFT[index - 1][nr];
 	int err;