hwmon: (adt7462) Fix pin 28 monitoring

The ADT7462_PIN28_VOLT value is a 4-bit field, so the corresponding
shift must be 4.
Signed-off-by: Roger Blofeld <blofeldus@yahoo.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>

drivers/hwmon/adt7462.c

@@ -94,7 +94,7 @@ static const unsigned short normal_i2c[] = { 0x58, 0x5C, I2C_CLIENT_END };
 #define		ADT7462_PIN24_SHIFT		6
 #define		ADT7462_PIN26_VOLT_INPUT	0x08
 #define		ADT7462_PIN25_VOLT_INPUT	0x20
-#define		ADT7462_PIN28_SHIFT		6	/* cfg3 */
+#define		ADT7462_PIN28_SHIFT		4	/* cfg3 */
 #define		ADT7462_PIN28_VOLT		0x5
 
 #define ADT7462_REG_ALARM1			0xB8