Provides information about

- usage of the bootefi command
- overview of UEFI
- interaction between U-Boot and EFI drivers
Signed-off-by: NHeinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: NLeif Lindholm <leif.lindholm@linaro.org>
Acked-by: NLeif Lindholm <leif.lindholm@linaro.org>
Signed-off-by: NAlexander Graf <agraf@suse.de>