ARM: mx5: move to a standard arch/board approach

Move the MX5 based boards to arch/arm/cpu/armv7/mx5, following the
commit: 89ebc82137bebb11a8191f8b9cbf08f2533ae8bc

Signed-off-by: Andrej Rosano <andrej@inversepath.com>
Cc: Stefano Babic <sbabic@denx.de>
Cc: Vagrant Cascadian <vagrant@debian.org>
Tested-by: Chris Kuethe <chris.kuethe@gmail.com>
diff --git a/arch/arm/cpu/armv7/mx5/Kconfig b/arch/arm/cpu/armv7/mx5/Kconfig
new file mode 100644
index 0000000..960a718
--- /dev/null
+++ b/arch/arm/cpu/armv7/mx5/Kconfig
@@ -0,0 +1,16 @@
+if ARCH_MX5
+
+config MX5
+	bool
+	default y
+
+config MX51
+	bool
+
+config MX53
+	bool
+
+config SYS_SOC
+	default "mx5"
+
+endif