staging: rts5139: add vmalloc.h to some files to fix the build.

This is needed to fix the build on alpha and ppc at the least.
Reported-by: Andrew Morton <akpm@linux-foundation.org>
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: edwin_rong <edwin_rong@realsil.com.cn>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/rts5139/ms.c

@@ -27,6 +27,7 @@
 #include <linux/kthread.h>
 #include <linux/sched.h>
 #include <linux/slab.h>
+#include <linux/vmalloc.h>
 
 #include "debug.h"
 #include "trace.h"

drivers/staging/rts5139/rts51x_scsi.c

@@ -27,6 +27,7 @@
 #include <linux/kthread.h>
 #include <linux/sched.h>
 #include <linux/slab.h>
+#include <linux/vmalloc.h>
 
 #include <scsi/scsi.h>
 #include <scsi/scsi_eh.h>

drivers/staging/rts5139/xd.c

@@ -26,6 +26,7 @@
 #include <linux/blkdev.h>
 #include <linux/kthread.h>
 #include <linux/sched.h>
+#include <linux/vmalloc.h>
 
 #include "debug.h"
 #include "trace.h"