arm: keystone: Move cmd_ddr3 to a common place

Move cmd_ddr3 to cmd/ti in order to make
it build for non-keystone TI platforms.

Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
[trini: Rename to ddr3.c not cmd_ddr3.c]
Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/cmd/ti/Kconfig b/cmd/ti/Kconfig
new file mode 100644
index 0000000..efeff0d
--- /dev/null
+++ b/cmd/ti/Kconfig
@@ -0,0 +1,10 @@
+menu "TI specific command line interface"
+
+config CMD_DDR3
+	bool "command for verifying DDR features"
+	help
+	   Support for testing ddr3 on TI platforms. This command
+	   supports memory verification, memory comapre and ecc
+	   verification if supported.
+
+endmenu