ARM: mxs: Add build configuration for mxs

Signed-off-by: Shawn Guo <shawn.guo@freescale.com>
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
diff --git a/arch/arm/mach-mxs/Makefile.boot b/arch/arm/mach-mxs/Makefile.boot
new file mode 100644
index 0000000..eb541e0
--- /dev/null
+++ b/arch/arm/mach-mxs/Makefile.boot
@@ -0,0 +1 @@
+zreladdr-y := 0x40008000