Staging: pohmelfs: net.c: include vmalloc.h

on Sparc64:
drivers/staging/pohmelfs/net.c:33: error: implicit declaration of function 'vmalloc'
drivers/staging/pohmelfs/net.c:42: error: implicit declaration of function 'vfree'
Signed-off-by: Alexander Beregalov <a.beregalov@gmail.com>
Acked-by: Evgeniy Polyakov <zbr@ioremap.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/pohmelfs/net.c

@@ -22,6 +22,7 @@
 #include <linux/poll.h>
 #include <linux/swap.h>
 #include <linux/syscalls.h>
+#include <linux/vmalloc.h>
 
 #include "netfs.h"