spi: butterfly: remove cast to void

checkpatch was complaining about space after cast. But the cast to void
is not required at that place.

Signed-off-by: Sudip Mukherjee <sudip@vectorindia.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
diff --git a/drivers/spi/spi-butterfly.c b/drivers/spi/spi-butterfly.c
index f520eaa..8fc284d 100644
--- a/drivers/spi/spi-butterfly.c
+++ b/drivers/spi/spi-butterfly.c
@@ -289,7 +289,7 @@
 clean1:
 	parport_unregister_device(pd);
 clean0:
-	(void) spi_master_put(pp->bitbang.master);
+	spi_master_put(pp->bitbang.master);
 done:
 	pr_debug("%s: butterfly probe, fail %d\n", p->name, status);
 }
@@ -317,7 +317,7 @@
 	parport_release(pp->pd);
 	parport_unregister_device(pp->pd);
 
-	(void) spi_master_put(pp->bitbang.master);
+	spi_master_put(pp->bitbang.master);
 }
 
 static struct parport_driver butterfly_driver = {