Staging: rtl8192u: Replace header files

Files <asm/string.h> and <asm/errno.h> should not be included directly.
This patch fixes the following checkpatch.pl warnings:
Use #include <linux/errno.h> instead of <asm/errno.h>
Use #include <linux/string.h> instead of <asm/string.h>
Signed-off-by: Ksenija Stanojevic <ksenija.stanojevic@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8192u/ieee80211/ieee80211_crypt.c

@@ -15,8 +15,8 @@
 #include <linux/module.h>
 #include <linux/init.h>
 #include <linux/slab.h>
-#include <asm/string.h>
-#include <asm/errno.h>
+#include <linux/string.h>
+#include <linux/errno.h>
 
 #include "ieee80211.h"