ALSA: hdspm - cleanup __user tags in ioctl()

This makes the code cleaner and silences a Sparse complaint:
sound/pci/rme9652/hdspm.c:6341:23: warning: incorrect type in assignment (incompatible argument 4 (different address spaces))
sound/pci/rme9652/hdspm.c:6341:23:    expected int ( *ioctl )( ... )
sound/pci/rme9652/hdspm.c:6341:23:    got int ( static [toplevel] *<noident> )( ... )
sound/pci/rme9652/hdspm.c:6102:44: warning: dereference of noderef expression
sound/pci/rme9652/hdspm.c:6225:50: warning: dereference of noderef expression
sound/pci/rme9652/hdspm.c:6264:50: warning: dereference of noderef expression
sound/pci/rme9652/hdspm.c:6283:50: warning: dereference of noderef expression
sound/pci/rme9652/hdspm.c:6289:59: warning: dereference of noderef expression

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/pci/rme9652/hdspm.c

@@ -6097,7 +6097,7 @@ static inline int copy_u32_le(void __user *dest, void __iomem *src)
 }
 
 static int snd_hdspm_hwdep_ioctl(struct snd_hwdep *hw, struct file *file,
-		unsigned int cmd, unsigned long __user arg)
+		unsigned int cmd, unsigned long arg)
 {
 	void __user *argp = (void __user *)arg;
 	struct hdspm *hdspm = hw->private_data;
@@ -6222,7 +6222,7 @@ static int snd_hdspm_hwdep_ioctl(struct snd_hwdep *hw, struct file *file,
 		info.line_out = hdspm_line_out(hdspm);
 		info.passthru = 0;
 		spin_unlock_irq(&hdspm->lock);
-		if (copy_to_user((void __user *) arg, &info, sizeof(info)))
+		if (copy_to_user(argp, &info, sizeof(info)))
 			return -EFAULT;
 		break;
 
@@ -6261,7 +6261,7 @@ static int snd_hdspm_hwdep_ioctl(struct snd_hwdep *hw, struct file *file,
 			break;
 		}
 
-		if (copy_to_user((void __user *) arg, &status, sizeof(status)))
+		if (copy_to_user(argp, &status, sizeof(status)))
 			return -EFAULT;
 
 
@@ -6280,13 +6280,13 @@ static int snd_hdspm_hwdep_ioctl(struct snd_hwdep *hw, struct file *file,
 		if (hdspm->tco)
 			hdspm_version.addons |= HDSPM_ADDON_TCO;
 
-		if (copy_to_user((void __user *) arg, &hdspm_version,
+		if (copy_to_user(argp, &hdspm_version,
 					sizeof(hdspm_version)))
 			return -EFAULT;
 		break;
 
 	case SNDRV_HDSPM_IOCTL_GET_MIXER:
-		if (copy_from_user(&mixer, (void __user *)arg, sizeof(mixer)))
+		if (copy_from_user(&mixer, argp, sizeof(mixer)))
 			return -EFAULT;
 		if (copy_to_user((void __user *)mixer.mixer, hdspm->mixer,
 					sizeof(struct hdspm_mixer)))