hwrng: intel - Fix included header from 'asm

This commit fixes the checkpatch warning:
WARNING: Use #include <linux/io.h> instead of <asm/io.h>
34: FILE: drivers/char/hw_random/intel-rng.c:34:
Signed-off-by: Tian Tao <tiantao6@hisilicon.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

drivers/char/hw_random/intel-rng.c

@@ -25,13 +25,13 @@
  */
 
 #include <linux/hw_random.h>
+#include <linux/io.h>
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/pci.h>
 #include <linux/stop_machine.h>
 #include <linux/delay.h>
 #include <linux/slab.h>
-#include <asm/io.h>
 
 
 #define PFX	KBUILD_MODNAME ": "