ARM: imx: use debug_ll_io_init() for imx6q

Use debug_ll_io_init() to map low level debug port for imx6q, so that
arch/arm/mach-imx/lluart.c can be removed.

Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
diff --git a/arch/arm/mach-imx/mach-imx6q.c b/arch/arm/mach-imx/mach-imx6q.c
index a009df7..ce7476d 100644
--- a/arch/arm/mach-imx/mach-imx6q.c
+++ b/arch/arm/mach-imx/mach-imx6q.c
@@ -31,6 +31,7 @@
 #include <asm/hardware/cache-l2x0.h>
 #include <asm/hardware/gic.h>
 #include <asm/mach/arch.h>
+#include <asm/mach/map.h>
 #include <asm/mach/time.h>
 #include <asm/system_misc.h>
 
@@ -216,7 +217,7 @@
 
 static void __init imx6q_map_io(void)
 {
-	imx_lluart_map_io();
+	debug_ll_io_init();
 	imx_scu_map_io();
 }