armv8: layerscape: properly use CPU_RELEASE_ADDR

The generic armv8 code already has support to bring up the secondary
cores. Thus, don't hardcode the jump in the layerscape lowlevel_init to
the spin table code; instead just return early and let the common armv8
code handle the jump. This way we can actually use the CPU_RELEASE_ADDR
feature.

Signed-off-by: Michael Walle <michael@walle.cc>
[Rebased, Removed kontron_sl28.h change as file does not exist]
Signed-off-by: Priyanka Jain <priyanka.jain@nxp.com>
diff --git a/include/configs/ls1028a_common.h b/include/configs/ls1028a_common.h
index fe4a87b..4863fb2 100644
--- a/include/configs/ls1028a_common.h
+++ b/include/configs/ls1028a_common.h
@@ -28,7 +28,7 @@
 /*
  * SMP Definitinos
  */
-#define CPU_RELEASE_ADDR		secondary_boot_func
+#define CPU_RELEASE_ADDR		secondary_boot_addr
 
 /* Generic Timer Definitions */
 #define COUNTER_FREQUENCY		25000000	/* 25MHz */