arch/tile: fix reversed test of strict_strtol() return value

This fixes the "initfree" boot argument.

Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
diff --git a/arch/tile/mm/init.c b/arch/tile/mm/init.c
index 9a62479..2ef9ce5 100644
--- a/arch/tile/mm/init.c
+++ b/arch/tile/mm/init.c
@@ -1000,7 +1000,7 @@
 static int __init set_initfree(char *str)
 {
 	long val;
-	if (strict_strtol(str, 0, &val)) {
+	if (strict_strtol(str, 0, &val) == 0) {
 		initfree = val;
 		pr_info("initfree: %s free init pages\n",
 			initfree ? "will" : "won't");