barebox: fix license information

The barebox license should be "GPLv2 with exceptions", and not GPLv2.

Signed-off-by: Simon Dawson <simond@trainfx.com>
Acked-by: Luca Ceresoli <luca@lucaceresoli.net>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
1 file changed