ARM i.MX53 enable SMD board bootup

1. Add Kconfig and Makefile entries
2. Add board definition
3. enable uart and fec for SMD board

Signed-off-by: Yong Shen <yong.shen@freescale.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
diff --git a/arch/arm/mach-mx5/Kconfig b/arch/arm/mach-mx5/Kconfig
index f2f0731..7c85853 100644
--- a/arch/arm/mach-mx5/Kconfig
+++ b/arch/arm/mach-mx5/Kconfig
@@ -133,6 +133,13 @@
 	  Include support for MX53 EVK platform. This includes specific
 	  configurations for the board and its peripherals.
 
+config MACH_MX53_SMD
+	bool "Support MX53 SMD platforms"
+	select SOC_IMX53
+	select IMX_HAVE_PLATFORM_IMX_UART
+	help
+	  Include support for MX53 SMD platform. This includes specific
+	  configurations for the board and its peripherals.
 
 config MACH_MX50_RDP
 	bool "Support MX50 reference design platform"