This patch adds basic support for the AM3517EVM.
It includes:
	- Board files (.c and .h)
	- Default configuration file
	- Updates for Makefile
Signed-off-by: NVaibhav Hiremath <hvaibhav@ti.com>
Signed-off-by: NSanjeev Premi <premi@ti.com>
Signed-off-by: NSandeep Paulraj <s-paulraj@ti.com>