Staging: skein: Remove space after cast

Remove unnecessary space after cast. Problem found using checkpatch.pl
CHECK: No space is necessary after a cast.

Signed-off-by: Aybuke Ozdemir <aybuke.147@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/staging/skein/skein_generic.c b/drivers/staging/skein/skein_generic.c
index c112694..e29b9ab 100644
--- a/drivers/staging/skein/skein_generic.c
+++ b/drivers/staging/skein/skein_generic.c
@@ -22,7 +22,7 @@
 
 static int skein256_init(struct shash_desc *desc)
 {
-	return skein_256_init((struct skein_256_ctx *) shash_desc_ctx(desc),
+	return skein_256_init((struct skein_256_ctx *)shash_desc_ctx(desc),
 			SKEIN256_DIGEST_BIT_SIZE);
 }