crypto: picoxcell - Include linux/sizes.h

This driver uses SZ_64K so it should include linux/sizes.h rather
than relying on others to pull it in for it.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
diff --git a/drivers/crypto/picoxcell_crypto.c b/drivers/crypto/picoxcell_crypto.c
index eb2a0ca..aabf9d4 100644
--- a/drivers/crypto/picoxcell_crypto.c
+++ b/drivers/crypto/picoxcell_crypto.c
@@ -40,6 +40,7 @@
 #include <linux/rtnetlink.h>
 #include <linux/scatterlist.h>
 #include <linux/sched.h>
+#include <linux/sizes.h>
 #include <linux/slab.h>
 #include <linux/timer.h>