staging: more missing slab.h inclusions

Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/solo6x10/enc.c

@@ -18,6 +18,7 @@
  */
 
 #include <linux/kernel.h>
+#include <linux/slab.h>
 #include "solo6x10.h"
 #include "osd-font.h"
 

drivers/staging/solo6x10/g723.c

@@ -21,6 +21,7 @@
 #include <linux/mempool.h>
 #include <linux/poll.h>
 #include <linux/kthread.h>
+#include <linux/slab.h>
 #include <linux/freezer.h>
 #include <sound/core.h>
 #include <sound/initval.h>