uboot-imx

ARM: zynq: Choose boot image based on OF_SEPARATE macro

OF_CONTROL is enabled by default for all Zynq boards.
The difference between two boot images is done by OF_SEPARATE
or OF_EMBED macros.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Reviewed-by: Tom Rini <trini@konsulko.com>