hwmon: (lm70) Convert semaphore to mutex

#include <linux/err.h>

#include <linux/sysfs.h>

#include <linux/hwmon.h>

#include <linux/mutex.h>

#include <linux/spi/spi.h>

#include <asm/semaphore.h>

#define DRVNAME		"lm70"

struct lm70 {

	struct device *hwmon_dev;

	struct semaphore sem;

	struct mutex lock;

};

/* sysfs hook function */

	s16 raw=0;

	struct lm70 *p_lm70 = dev_get_drvdata(&spi->dev);

	if (down_interruptible(&p_lm70->sem))

	if (mutex_lock_interruptible(&p_lm70->lock))

		return -ERESTARTSYS;

	/*

	val = ((int)raw/32) * 250;

	status = sprintf(buf, "%d\n", val); /* millidegrees Celsius */

out:

	up(&p_lm70->sem);

	mutex_unlock(&p_lm70->lock);

	return status;

}

	if (!p_lm70)

		return -ENOMEM;

	init_MUTEX(&p_lm70->sem);

	mutex_init(&p_lm70->lock);

	/* sysfs hook */

	p_lm70->hwmon_dev = hwmon_device_register(&spi->dev);