libpayload: Fix lookup by label in CMOS layouts

The condition to compare the labels was twisted.

Change-Id: I34a665aa87e2ff0480eda0f249bbbea8a8fe68d8
Signed-off-by: Nico Huber <nico.huber@secunet.com>
Reviewed-on: http://review.coreboot.org/1941
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
diff --git a/payloads/libpayload/drivers/options.c b/payloads/libpayload/drivers/options.c
index d15d81b..d497c0a 100644
--- a/payloads/libpayload/drivers/options.c
+++ b/payloads/libpayload/drivers/options.c
@@ -243,7 +243,7 @@
 		cmos_enum;
 		cmos_enum = next_cmos_enum_of_id(cmos_enum, config_id)) {
 		if (((value == NULL) || (cmos_enum->value == *value)) &&
-		    ((text == NULL) || (memcmp((const char*)cmos_enum->text, text, len)))) {
+		    ((text == NULL) || (memcmp((const char*)cmos_enum->text, text, len) == 0))) {
 			return cmos_enum;
 		}
 	}