Keep rpi-firmware up-to-date with the kernel
vesion bump (4.19.97).
Go back to sha1 version scheme instead of official tag (after
only two tag versions) to keep up with the up-to-date kernel
version (as the offical last tag is for 4.19.94).
Update boot/LICENCE.broadcom hash according to the
'Update to support customisation program ' change ([1]).
[1] dd9e9ebb5d (diff-b7cccbd9821a372750de822dfd97a843)
Signed-off-by: Peter Seiderer <ps.report@gmx.net>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
6bf05ca75f