atyfb: fix a cast

The argument to iounmap() is void __iomem *. Fix the cast.

Signed-off-by: Ville Syrjala <syrjala@sci.fi>
Cc: "Antonino A. Daplas" <adaplas@pol.net>
Cc: Krzysztof Helt <krzysztof.h1@poczta.fm>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/drivers/video/aty/atyfb_base.c b/drivers/video/aty/atyfb_base.c
index e38398f..620ba81 100644
--- a/drivers/video/aty/atyfb_base.c
+++ b/drivers/video/aty/atyfb_base.c
@@ -3335,7 +3335,7 @@
 		PRINTKE("no BIOS frequency table found, use parameters\n");
 		ret = -ENXIO;
 	}
-	iounmap((void* __iomem )bios_base);
+	iounmap((void __iomem *)bios_base);
 
 	return ret;
 }