imx: add i.MX6ULZ board

Add i.MX6ULZ board support. the i.MX6ULZ is SW compatible
with i.MX6ULL. so most code of i.MX6ULL can be reused
by i.MX6ULZ.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
Reviewed-by: Ye Li <ye.li@nxp.com>
Reviewed-by: Fabio Estevam <festevam@gmail.com>
diff --git a/board/freescale/mx6ullevk/MAINTAINERS b/board/freescale/mx6ullevk/MAINTAINERS
index 73031cd..3d1b256 100644
--- a/board/freescale/mx6ullevk/MAINTAINERS
+++ b/board/freescale/mx6ullevk/MAINTAINERS
@@ -5,3 +5,4 @@
 F:	include/configs/mx6ullevk.h
 F:	configs/mx6ull_14x14_evk_defconfig
 F:	configs/mx6ull_14x14_evk_plugin_defconfig
+F:	configs/mx6ulz_14x14_evk_defconfig
diff --git a/board/freescale/mx6ullevk/mx6ullevk.c b/board/freescale/mx6ullevk/mx6ullevk.c
index e119347..20ae011 100644
--- a/board/freescale/mx6ullevk/mx6ullevk.c
+++ b/board/freescale/mx6ullevk/mx6ullevk.c
@@ -84,7 +84,10 @@
 #endif
 
 #ifdef CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG
-	env_set("board_name", "EVK");
+	if (is_cpu_type(MXC_CPU_MX6ULZ))
+		env_set("board_name", "ULZ-EVK");
+	else
+		env_set("board_name", "EVK");
 	env_set("board_rev", "14X14");
 #endif
 
@@ -93,7 +96,10 @@
 
 int checkboard(void)
 {
-	puts("Board: MX6ULL 14x14 EVK\n");
+	if (is_cpu_type(MXC_CPU_MX6ULZ))
+		puts("Board: MX6ULZ 14x14 EVK\n");
+	else
+		puts("Board: MX6ULL 14x14 EVK\n");
 
 	return 0;
 }