crypto: sl3516 - fix duplicated inclusion

drivers/crypto/gemini/sl3516-ce-cipher.c: linux/io.h is included more than once.

Generated by: scripts/checkincludes.pl

Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: kernel test robot <lkp@intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

Author: xilabao

drivers/crypto/gemini/sl3516-ce-cipher.c

@@ -12,7 +12,6 @@
 #include <linux/dma-mapping.h>
 #include <linux/delay.h>
 #include <linux/io.h>
-#include <linux/io.h>
 #include <linux/pm_runtime.h>
 #include <crypto/scatterwalk.h>
 #include <crypto/internal/skcipher.h>