board: laird: add WB50N CPU module

This board is based on the Atmel sama5d3 eval boards.
Supporting the following features:
 - Boot from NAND Flash
 - Ethernet
 - FIT
 - SPL

Signed-off-by: Ben Whitten <ben.whitten@lairdtech.com>
Signed-off-by: Dan Kephart <dan.kephart@lairdtech.com>
diff --git a/arch/arm/mach-at91/Kconfig b/arch/arm/mach-at91/Kconfig
index 1d35d39..6907263 100644
--- a/arch/arm/mach-at91/Kconfig
+++ b/arch/arm/mach-at91/Kconfig
@@ -241,6 +241,13 @@
 	select CPU_ARM926EJS
 	select SUPPORT_SPL
 
+config TARGET_WB50N
+	bool "Support Laird WB50N"
+	select BOARD_LATE_INIT
+	select CPU_V7
+	select SUPPORT_SPL
+	select BOARD_EARLY_INIT_F
+
 endchoice
 
 config SYS_SOC
@@ -276,6 +283,7 @@
 source "board/siemens/taurus/Kconfig"
 source "board/siemens/smartweb/Kconfig"
 source "board/laird/wb45n/Kconfig"
+source "board/laird/wb50n/Kconfig"
 
 config SPL_LDSCRIPT
 	default "arch/arm/mach-at91/arm926ejs/u-boot-spl.lds" if CPU_ARM926EJS