tree b1519e0c52b6cc6543ca323b504ae399fa159418
parent 53456f553fc9ceaea0c78e0e7c4822e5100b54de
author Stefan Agner <stefan.agner@toradex.com> 1502844583 -0700
committer Stefano Babic <sbabic@denx.de> 1503660707 +0200

imx: use BOOT_DEVICE_BOARD instead of UART

i.MX 6 serial downloader is not necessarily booting via UART but can
also boot from USB. In fact only some i.MX chips have serial
downloader support via UART (e.g. 6UL/ULL and Vybrid) but all of
them have serial downloader support via USB. Use the more appropriate
BOOT_DEVICE_BOARD define which is used for ROM provided recovery
mechanisms in general.

Signed-off-by: Stefan Agner <stefan.agner@toradex.com>