[ALSA] Add missing inclusion of linux/device.h

Digigram VX core,Digigram VX222 driver,Digigram VX Pocket driver
Added the missing inclusion of <linux/device.h>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/drivers/vx/vx_core.c

@@ -25,6 +25,7 @@
 #include <linux/slab.h>
 #include <linux/interrupt.h>
 #include <linux/init.h>
+#include <linux/device.h>
 #include <linux/firmware.h>
 #include <sound/core.h>
 #include <sound/pcm.h>

sound/drivers/vx/vx_hwdep.c

@@ -21,6 +21,7 @@
  */
 
 #include <sound/driver.h>
+#include <linux/device.h>
 #include <linux/firmware.h>
 #include <sound/core.h>
 #include <sound/hwdep.h>

sound/pci/vx222/vx222_ops.c

@@ -22,6 +22,7 @@
 
 #include <sound/driver.h>
 #include <linux/delay.h>
+#include <linux/device.h>
 #include <linux/firmware.h>
 #include <sound/core.h>
 #include <sound/control.h>

sound/pcmcia/vx/vxp_ops.c

@@ -22,6 +22,7 @@
 
 #include <sound/driver.h>
 #include <linux/delay.h>
+#include <linux/device.h>
 #include <linux/firmware.h>
 #include <sound/core.h>
 #include <asm/io.h>