rtlwifi: Need to include vmalloc.h

Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/wireless/rtlwifi/wifi.h

@@ -34,6 +34,7 @@
 #include <linux/firmware.h>
 #include <linux/version.h>
 #include <linux/etherdevice.h>
+#include <linux/vmalloc.h>
 #include <linux/usb.h>
 #include <net/mac80211.h>
 #include "debug.h"