sound_firmware: don't bother with filp_close()

it's opened read-only and never installed into any descriptor tables;
fput() will do just as well.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

sound/sound_firmware.c

 #include <linux/vmalloc.h>
 #include <linux/module.h>
 #include <linux/fs.h>
+#include <linux/file.h>
 #include <linux/mm.h>
 #include <linux/sched.h>
 #include <asm/uaccess.h>
@@ -23,14 +24,14 @@ static int do_mod_firmware_load(const char *fn, char **fp)
 	if (l <= 0 || l > 131072)
 	{
 		printk(KERN_INFO "Invalid firmware '%s'\n", fn);
-		filp_close(filp, NULL);
+		fput(filp);
 		return 0;
 	}
 	dp = vmalloc(l);
 	if (dp == NULL)
 	{
 		printk(KERN_INFO "Out of memory loading '%s'.\n", fn);
-		filp_close(filp, NULL);
+		fput(filp);
 		return 0;
 	}
 	pos = 0;
@@ -38,10 +39,10 @@ static int do_mod_firmware_load(const char *fn, char **fp)
 	{
 		printk(KERN_INFO "Failed to read '%s'.\n", fn);
 		vfree(dp);
-		filp_close(filp, NULL);
+		fput(filp);
 		return 0;
 	}
-	filp_close(filp, NULL);
+	fput(filp);
 	*fp = dp;
 	return (int) l;
 }