i.MX6Q: mx6qsabrelite: Add keypress support to alter boot flow

Uses the 'magic_keys' idiom as described in doc/README.kbd:
	http://lists.denx.de/pipermail/u-boot/2012-April/122502.html

Signed-off-by: Eric Nelson <eric.nelson@boundarydevices.com>
Acked-by: Marek Vasut <marex@denx.de>
Acked-by: Stefano Babic <sbabic@denx.de>
2 files changed