resource cgroups: remove bogus cast

The memparse() function already accepts const char * as the parsing string.

Signed-off-by: Davidlohr Bueso <dave@gnu.org>
Acked-by: Pavel Emelyanov <xemul@parallels.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
diff --git a/kernel/res_counter.c b/kernel/res_counter.c
index 34683ef..6d269cc 100644
--- a/kernel/res_counter.c
+++ b/kernel/res_counter.c
@@ -159,8 +159,7 @@
 		return 0;
 	}
 
-	/* FIXME - make memparse() take const char* args */
-	*res = memparse((char *)buf, &end);
+	*res = memparse(buf, &end);
 	if (*end != '\0')
 		return -EINVAL;