package/mali-driver: remove Miquèl from the DEVELOPERS list

I am not really maintaining these packages, I don't follow closely
enough nor use them to take the time to make the necessary changes.
Giulio has been much more reactive than me to fix issues and he is
already listed for them anyway.

Cc: Giulio Benetti <giulio.benetti@benettiengineering.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>