[ALSA] Remove sound/driver.h

This header file exists only for some hacks to adapt alsa-driver
tree.  It's useless for building in the kernel.  Let's move a few
lines in it to sound/core.h and remove it.
With this patch, sound/driver.h isn't removed but has just a single
compile warning to include it.  This should be really killed in
future.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>

sound/pci/cs46xx/cs46xx.c

@@ -25,7 +25,6 @@
     reloading the module may solve this.
 */
 
-#include <sound/driver.h>
 #include <linux/pci.h>
 #include <linux/time.h>
 #include <linux/init.h>

sound/pci/cs46xx/cs46xx_lib.c

@@ -45,7 +45,6 @@
  *
  */
 
-#include <sound/driver.h>
 #include <linux/delay.h>
 #include <linux/pci.h>
 #include <linux/pm.h>

sound/pci/cs46xx/dsp_spos.c

@@ -20,7 +20,6 @@
  */
 
 
-#include <sound/driver.h>
 #include <asm/io.h>
 #include <linux/delay.h>
 #include <linux/pm.h>

sound/pci/cs46xx/dsp_spos_scb_lib.c

@@ -21,7 +21,6 @@
  */
 
 
-#include <sound/driver.h>
 #include <asm/io.h>
 #include <linux/delay.h>
 #include <linux/pm.h>