uboot-imx

am335x_evm: enable DFU RAM

Enable DFU for RAM, provide example dfu_alt_info

Signed-off-by: Afzal Mohammed <afzal.mohd.ma@gmail.com>
Cc: Heiko Schocher <hs@denx.de>
Cc: Tom Rini <trini@ti.com>
Cc: Marek Vasut <marex@denx.de>
Cc: Lukasz Majewski <l.majewski@samsung.com>
Cc: Pantelis Antoniou <panto@antoniou-consulting.com>
Reviewed-by: Lukasz Majewski <l.majewski@samsung.com>