At91dataflashboot is an ancient (2006) fork of at91bootstrap1 specifically
for the Atmel/Microchip AT45 series (dataflash) of serial flashes.
The package hasn't seen any meaningful updates since, is not used by any
defconfigs and at91bootstrap3 nowadays has AT45 support - So remove the
package.
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
[yann.morin.1998@free.fr: update .checkpackageignore]
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>